Alzheimer’s Disease Neuroimaging Initiative

Core Q&As

MRI Core Q&A

Dear experts, I hope this email finds you well. I wanted to check if it’s possible to request MRI data in DICOM format, specifically T1-weighted and T2-weighted images, ...
11/12/24

problem to download mri image dataset for AD
10/30/24

Hi there, I've downloaded around ~150 fMRI sequences that only appear to have 1 .dcm file, instead of the 1000s expected. For example, /ADNI 5/006_S_4485/Axial_fcMRI__EYES_O...
10/23/24

Hello, when I create new collections, the data are added in DCM format and not Nifti and I didn't see the option to add as NIFTI at anywhere on the page. Even when I download,...
10/14/24

Hello, I was wondering if the images in ADNI are those typically collected in standard clinical care or if they are from research projects (so may be more detailed sequence...
10/09/24

Downloaded the ADNI_MRI dataset , the one containing images . How do i know the classification of those images . Because there is no any data in the zip file about images when...
09/26/24

Greetings, I have access to the ADNI website and aim to download PET and MRI images for distinct disease groups concurrently. Nevertheless, I've encountered an issue where the...
09/11/24

I'm trying to load a multi shell (b=0,500,1000,2000) diffusion sequence based on the ADNI4 protocol on our Siemens Skyra VE11C and I can't locate the appropriate diffusion dir...
09/09/24

To, The Director, ADNI Subject: Request for the access of set of MRI and PET brain scans of a single subject Dear Sir/Madam, I hope this letter finds you well. M...
09/03/24

Dear expert I want to ask is there any recommendation for what slice from the .dcm file i can take to convert it to an image. I want to train the image instead of the whole s...
09/03/24

Can I use data from FMRI, SMRI, PET, CSFT tau, CSFP tau modalities to fuse information from a subject? How can I search for the results I want? Can you recommend using Origina...
08/31/24

Hello, my research group is interested in downloading and processing the GE 3D pCASL images. It is my understanding that the M0 is available for these images, but we are not s...
08/30/24

Hi, My understanding is that if a ADNI participant has amyloid PET AV45 data available, it should have a MRI scan available (don't have to be concurrently). However, we...
08/26/24

Is there any option to get the selected type of files? that is I need nifti images, not dicom. how to do that
08/22/24

Dear expert, I would like to thank you for providing the database, i am currently working on a research for detecting the signs of AD using MRI scan and cognitive test resul...
05/30/24

Dear MRI Core, We are running a study doing analyses on cortical surface stats from datasets of different AD cohorts. We would like to include ADNI in this. For this, we wo...
04/25/24

Hey, For fMRI there are different protocols (namely, description) e.g.: Resting_State_fMRI, Extended_Resting_State_fMRI AXIAL_RS_fMRI__EYES_OPEN_, Axial_rsFMRI_Eyes_Open an...
04/24/24

I need clarification . There are multiple MRI records and sometimes fMRI records for each individual. I need the earliest fMRI record and one MRI record which is closet in tim...
04/22/24

Hello, I am currently working with the CN DWI data of ADNI3 and require the EPI as well as echo spacing values of the DWI images for data pre-processing. The data I am using ...
03/26/24

How can I obtain slice order of resting-state fMRI data, especially for those scanned in Philips MRI scanner?
03/05/24

Hi, In ADSP_PHC_T1-FS_Dec 2023 there are 700 cases with 2 or more MRIs on the same visit. RID#416 has 4 MRIs on the baseline visit on 04/20/2006, all by SIEMENS 1.5T. Could ...
02/01/24

Hi, I am wondering if there is some explanations for the descriptions for fMRI data. I know all of them are resting state fMRI but not sure if any significant difference exist...
11/01/23

Hello I want to work onÂ early diagnosis ofÂ Alzheimer's disease by using imaging such as diffusion kurtosis imaging(DKI) andÂ neurite orientation dispersion and densit...
02/04/23

Can you point out where to find the sequence information of MRI, and DTI for ADNI2/GO such as TE/TR, TI, and flip angle? I checked https://adni.loni.usc.edu/methods/documents/...
12/03/22

Dear ADNI MRI expert, Iâ€™m looking for data on the number and location of cerebral micro bleeds. On the ADNI website (Data types -> MRI IMAGE), I could find that the M...
11/28/22

Dear Madam/Sir, I'm a postdoc from Max Planck Institute for Human development. I'm writing the email to ask do you know if there is an overview of the design of the fMRI tasks...
10/05/22

Hi ADNI Experts, I am trying to download DICOM images from the MB-DTI ADNI3 dataset so I can convert using dcm2nii to get the b-val/b-vec files. However, when I download the ...
09/07/22

Dear MRI Core Experts: I am planning to adapt ADNI3 MR protocols on our SIEMENS 3T Prisma Scanner. I am wondering where I can download the diffusion gradient table of protocol...
08/23/22

Dear MRI core, I am working with FreeSurfer version 4.3. Here I noticed that some participants were twice included. Is the reason that after the ADNI 1 protocol there was a MP...
07/26/22

Hello experts, I am working on ADNI fMRI data and using the "MAYOADIRL_MRI_FMRI_NFQ_05_09_22.csv" spreadsheet to find out the slice timing as suggested in previous posts. ...
07/17/22

Dear ADNI data experts, I was trying to use the ADNI MRI analysis result, so I went to IDA.LONI to download the UCSF - Cross-Sectional FreeSurfer (FreeSurfer Version 4.3) ...
06/02/22

Does the siteID of the sample represent the imaging center of the structural MRI? If not, then how do I know the imaging center corresponding to the MRI data?
04/13/22

Hello, I am performing voxel-based morphometry on the ADNI3 dataset. Am I able to lump subjects with IR-FSPGR T1's with those with MPRAGE T1's in my analysis? Or are the seque...
12/11/20

Is DWI data for AD patients available ? if yes, how to search for it?
11/25/20

Hi, I am performing EPI correction for DTI data. Since only PA scan was provided and no reverse phase scan was given for EPI correction. I was looking for another method to do...
11/19/20

Hi ADNI team, I am interested in using quality controlled DTI images (Preprocessed) and I could successfully download the images. Could you tell me how I can query the b-t...
11/17/20

I would like to map DTI image with T1w image, For that which DTI image and T1w image should I download from ADNI? Is it ok, if I download the AXIAL DTI and T1w of the same sub...
10/22/20

Hi, For ADNI3, I understand two diffusion data are provided, one is basic with single b=0 shell and another one with multiple shells. Are they both named as 'Axial DTI'? I...
10/06/20

Hello, I'm working with the ADNI fMRI data. I noticed that some of the scans are labelled Axial_fcMRI_0_angle_(EYES_OPEN). I was wondering what the 0_angle piece meant and ...
09/30/20

May I ask what is the phase encode direction of the DTI scanner for all the sites? AP or PA. For this kind of information, is there a link or file I can download to learn the ...
08/27/20

Why are structural MRI much more common than fMRI? I noticed that several encounters have MRI but not fMRI available.
08/07/20

How do I know how many time points and how many slices does a subject image set include? Let's take the case of resting state images of a specific subject encounter. So far, ...
08/03/20

Dear ADNI expert, I have a couple of scans for the same subjects; one is an MRI T1w, and the other is a DTI scan. I noticed that the T1 scan is absolutely closer to the MNI s...
08/02/20

I read here methods/mri-tool/mri-pre-processing/ that pre-processing is not needed for MRI images. Is this true also for fMRI images? Do I need to perform any of unwrap, resli...
07/27/20

What refocusing flip train was used for the dual-echo FSE sequence by GE scanners in the ADNI-1 study? I cannot find the protocol sheet for GE scanners.
07/07/20

What is the TR of a fMRI image
07/03/20

Dear expert: In ADNI3, when l search fmri data, l found that some describtion is MB rsFMRI. Can you tell me what`s the reation batween them. Thanks a lot.
05/20/20

The slice timing is missing in all Philips scanner, and some Simens skyra scanner. Even these subjects have slice timing information, itâ€™s inconsistent, for example, a...
05/11/20

Hello! First, thanks for your time and for the database! I have a couple of questions about the images found in the ADNI database. First and foremost, I have been looking...
05/04/20

Hello, I want to use the cross-sectional FreeSurfer measurements from Adni 1, Go, 2 and 3. I have seen that these measurements can be found within the files UCSFFSX6_02_05_20....
03/05/20

Hi there, I hope you can help me. I am looking to analyse some 3D pCASL and 3D PASL data from ADNI-3. Ideally, I was hoping to use CBF maps which had already been generated, b...
02/24/20

Is it possible to download the DTI images corrected for motion, eddy-current and echo-planar imaging (EPI) induced susceptibility artifacts? I've looked in the data archive an...
02/05/20

Dear ADNI experts, I want to use the CBF value of the patients. And I found the \"UCSF - ASL Perfusion CBF by FreeSurfer ROI [ADNIGO,2]â€ file. In the file, there were th...
12/16/19

Hello. I am trying to do a longitudinal study using mild Alzheimer's Disease participants from the database. For all of the participants, that I have screened and decided to i...
11/11/19

where can i find the dicom header
10/22/19

I'm trying to draw FA and MD from the imaging data, so I need bval, and bvec files. When I tried to get them by converting DICOM files to nifty files using dcm2niix software, ...
10/09/19

I noticed that there is no fieldmap images in the GE scans, however, it was said in the MRI protocol that fieldmaps were obtained from every subject. Is there a way to obtain...
07/19/19

Dear experts, I am analyzing the rsfMRI from ADNI2 and ADNI3. I am able to find the slice order records for ADNI2 data but not for ADNI3 data. The ADNI3 manual said it's "eve...
05/24/19

Dear Experts. Disambiguation Request ~ re: "ASO" and "_ND". These two abbreviations appear in the field Series Description for many MRI acquisitions, but I cannot deduce t...
05/14/19

For 3D pASL by Siemens Skyra, may I know how many pairs of tag and control images should I expect?
04/09/19

I was wondering if 3D fast spin echo scans such as SPACE/VISTA/CUBE are being conducted in ADNI 3. Also, had they been collected in previous ADNIs? I see there are non-3D FSE...
05/17/18

Hi, I was wondering in ADNI3, are the phase data available for T2star weighted data. Thank you very much.
04/11/18

Hi, I was wondering how I could get the raw ASL-MRI data of ADNI3? in contrast to ADNI2 and ADNIGO where the raw ASL measurements (100 volumes of Tag and control and M0) were...
04/11/18

Hello, I found the T1-weighted images acquired with GE and FSPGR serials weren't performed gradwrap. So can I merge the images with SPGR serials which were performed gradwarp...
04/11/18

Hi, may I know what is the phase encoding direction for Axial DTI for ADNI2 sequences? Thanks for your help in advance.
04/10/18

Hello sir/madam, What is the difference between pre and post processed MRI Imaging data?
03/28/18

Dear, I'm doing some processing with MPRAGE and rs-fMRI modality images, however, I get a little confused with how to find slice scan order information in these iamges, the...
03/19/18

For the UCSF Cross-Sectional FreeSurfer (Version 4.3 and 5.1) datasets were the cortical thickness measurements for each region divided by the total intracranial volume ?
03/06/18

Dear ADNI experts, I would like to know if there is a difference between images identified as "Axial fcMRI (EYES OPEN)" and other resting-state images such as "Axial rsfMRI...
03/06/18

Hi ADNI experts, I see that in ADNI3 fieldmaps are recorded with Siemens and Phillips scanners. However I can't find fieldmaps from subjects recorded with GE scanners. A...
03/05/18

We recently downloaded a batch of ADNI 3 preprocessed MPRAGE images. I noticed that a couple subjects scanned on the Siemens Verio had two images on the IDA, one with MT1;N3m ...
02/28/18

Question about ASL sequence done under ADNI2 (for Siemens 3T Skyra). Can you tell me the "Inversion Time" parameter? (I assume it is something like 1800msec). I downloaded...
02/19/18

What are the PhaseEncodingDirections of the DTI ANDI3 Basic Scans for the Bo values? Is it alternating A-P/P-A?
02/16/18

Dear experts, I would like to know where I can find the MRI scanner models involved in ADNI1 and ADNIGO/2. Cheers
02/15/18

For ADNI-2 scans, how many channels should the dedicated head coil have?
02/13/18

Dear ADNI investigators, I would like to download baseline MRI preprocessed images from ADNI1 but I found two preprocessed versions of the same image, namely Scaled and Sca...
02/13/18

I just downloaded the first batch of multishell DTI images from ADNI 3. Are the bvals and bvecs for individual DWI stacks contained within the metadata of the .nii files? ...
01/25/18

I noticed that there are two type of fMRI images,fMRI and extended fMRI, i just get confused with that, could you please help me with what's the difference? thank you for your...
01/19/18

I want to use ADNI-2 preprocessed image. Image descriptions include MPRAGE, MPRAGE GRAPPA2, MPRAGE NO ANGFLE,MPRAGE_ND and so on. there is so many description name. Does ev...
01/02/18

Hello, Please what is the definition of "isotropic image"? It is an output volume when searching for rsfmri and dti. Thanks
12/11/17

dear Experts, I would like some animal's MRI data and genetic data, the ADNI have those data?Thank you!
11/17/17

In ADNI 3, fieldmap scans on Philips sites seem to include two magnitude images and two phase images. I would like to convert the unit of these two phase images into those in ...
11/13/17

Dear experts, A simple question, I am trying to obtain age (gender, etc) versus brain volume measurements obtained from Freesurfer. I guess I\'ll need to obtain the Freesur...
11/12/17

Hi, can you please tell me how to find the brain images for fmri? I clicked fMRI button under the Image section, but I found some people, like 009_S_0751, who don\'t have fMRI...
11/04/17

Hello, I would like to follow up on a question about the MRI acquisition for ADNI. We are just wondering about the rationale of acquiring straight axials for the structural ...
08/29/17

Dear ADNI MRI Core Team, We are looking to adapt ADNI 3 protocol for our Philips scanner. Would it be possible to get a copy of the exam card for Philips R5 for: a) structu...
08/25/17

Dear MRI core, In the file : "MAYOADIRL_MRI_IMAGEQC" In the column: "serie_time", if I have for example : 61254.421 -> it means that the scan was performed : 6 hrs 12 ...
06/08/17

Hi, I'm trying to decide whether the DTI images acquired in ADNI2 will be suitable for my research. In order to qualify, I need an isotropic voxel size of 2 mm. From the p...
03/09/17

Hi Experts This is a question about ADNI data. What is the slice order when scanning a resting state fMRI? for example ascending(firet --> bottom) Best regards. M-K
01/24/17

Whether Preprocessed MRI is registered or not?
01/10/17

What is the difference between wraping and registration? Thanks
01/10/17

Whether ADNI data is registered or not? Thanks
01/09/17

I have downloaded the ADNI2 dataset from LONI, using the "as archived" option. Currently I am using dcm2niix (previously used the python tool dicom2nifti) to convert to nifti,...
12/28/16

Where can I find the Arterial Spin Label (ASL) image sets?
12/19/16

Dear MRI Experts, When I look to the FreeSurfer 5.1 Corss-sectional results posted on 08/2016 I see that some data is missing from the equivalent subjects listed in the earli...
11/17/16

I need subjects with resting-state fMRI and DTI scans, simultaneously. However I can find anyone (I have found only one subject with AD). Is there any subject (AD, MCI and Nor...
11/16/16

I noticed the stroke.csv file is no longer available. Can you please tell me where I can find this information? I noticed the data dictionary is not updated to reflect this c...
11/04/16

I noticed, in the data collections, that different specifications are written regarding the scans : IR-SPGR, wacceleration calibration scan, 3-plane localizer, MPRAGE, MPRAGE ...
10/24/16

we would like to kindly inform you that the fMRI data have the problems mentioned in this link: http://adni.loni.usc.edu/methods/mri-analysis/mri-pre-processing/ I would kin...
10/11/16

Dear Sir / Madame I would be interested in using a subset of the ADNI data to generate an artificial dataset. At first instance, I would like to "learn" the distribution...
10/06/16

Dear ADNI MRI Core, We are PIT group from Hungary and we are trying to analyze the structure of the brain using brain-graphs. To build these brain-graphs (using Connectome ...
09/27/16

Dear MRI-Experts, We are wondering why the ADNI T1 sequences resulted in non-isotropic voxels. In most cases isotropic voxels were preferred, especially when the images are a...
09/23/16

Dear ADNI investigators, I would like to know if any of the participants who underwent a fMRI resting-state scan also underwent a DTI scan, since I saw that these scans wer...
09/12/16

Is ground truth available for Alzheimer images in ADNI datbase
08/29/16

We are designing a study on nondrug intervention in MCI. Would be interested to know your recommended, standard protocol for MRI study.
08/24/16

Hi,in the imaging collection, I can only find the group patient ,how can I found the control group and MCI group? Is the MRI data related to the genetics data? Thank you!
07/15/16

Hi ADNI experts, I noticed that it appears the ears are pressed against the head in the MRI scans. I checked the MRI Technical Procedures Manual, and it states "Provide...
06/29/16

Dear Experts, I see from prior helplist questions that the .nii header can be unreliable for determining TR (many I have tried say TR = 0). In my IDA data collection, when ...
06/10/16

Dear Sir or Madam, Our lab is using ADNI data to do analysis right now. I just find that the data format is quite different for some subjects. For example, 012_S_4128 has 6...
05/16/16

Dear ADNI experts, We have some resting scans downloaded from your website and try to preprocess them with fiedmap correction. One information we are not able to locate is ...
02/18/16

Dear Sir or Madam, Were any of the MRI data collected while participants were doing cognitive tasks? If so, where would I find more information about these tasks? Thank ...
02/18/16

We are interested in using the lessons learned from ADNI to do a multicenter hip MRI study, also using multiple MRI vendors. Is it possible to purchase the ADNI phantom? Will ...
12/15/15

Dear Expert, We are trying to preprocess the DTI data downloaded from ANDI and we are following the steps suggested here: http://web.stanford.edu/group/vista/cgi-bin/wiki/i...
12/04/15

Hi, I am currently processing DTI data and I was wondering if ADNI includes bval and bvec information in DICOM header. I tried to use MRIConverter and dcm2nii to extract .b...
11/24/15

Is there a way to limit the search results by the MR image matrix? Thanks.
11/18/15

We downloaded the diffusion MRI data, specifically the preprocessed images. However, we have doubts about how to find the information about the diffusion gradients directions....
11/05/15

L.s. How do I differentiate participants that have been included in ADNI 1 and are now in the follow-up in ADNI go vs the newly included participants ? Are the follow-up su...
11/02/15

Hello, We are trying to do longitudinal study for brain and Hippocampus. I have searched in ADNI database and could find two different studies that provide brain mask ( "Free...
10/21/15

?Thank you very much. The images are satisfactory for our purposes. Can I sort through the subjects who have highreshippo images to find 10 males and 10 females each with mi...
10/06/15

I am a neuroradiologist working with the memory clinic at Eastern Virginia Medical School to compare general radiologist, neuroradiologist, and NeuroQuant assessment of hippoc...
10/06/15

My question is, we searched all database for resting-state fMRI and ADNI Go/2, but only found 828 data, similar to the sample size stated in MAYOADIRL_MRI_FMRI_05_07_15. Of al...
10/02/15

I downloaded 180 MRI images. When I plot them with matlab code.. I found They are of different size. some are 160*256*256 others are 160*192*192 others are 160*256*240. Is th...
08/25/15

Dear sir/madam, As there have been upgrades in MRI machines, with reference to Siemen's Skyra 3T D11 to D13, are there parameters specific to D13 that is made available?
08/03/15

Dear Sir/Madam, Does Pre-Processed MR images (for exampe imageId:92646) need AC-PC alignment? Thank you for your help in advance Sincerely
08/01/15

Dear ADNI experts, I have noticed that some series have a step called N3m. For instance series 93981 has the following images: Image ID | Sequence ---------|-------------...
07/29/15

Hello, How can I find out which resting state fMRI volumes are affected by the "pencil artifact" and which ones are not? Also, where can I learn more about this artifact...
07/17/15

For the volumetric data calculated by FreeSurfer, do you also calculate age- and sex-adjusted percentiles? So for example, you would provide the hippocampal volume and an age-...
06/02/15

Dear ADNI experts, While inspecting the content of directories downloaded from IDA, I have noticed that some image ID are duplicated. For instance, image ID 58872 corres...
05/29/15

Hi expert, I downloaded the resting state fMRI data ( NiFTI 4D) and noticed that in the header TR had a value of 1 which I thought should be 3s instead. Is this a mistake? Th...
05/18/15

Hi, Can you explain the difference of processed MRI images between \"Spatially Normalized, Masked and N3 corrected T1 image\" and \"MPR; GradWarp; B1 Correction; N3; Scaled\"....
05/16/15

Dear Sir or Madam, When I downloaded the resting state image data, I found several patients only have one DICM file, which is totally different from others, which usually h...
05/07/15

Dear experts, I have recently noticed that there is a 4th pre-processing steps for T1 images (after gradwarping, B1 correction and N3 correction) called scaling. It's those...
05/04/15

Hi, I am working on processing resting state data. But I couldn't link the ID to the clinical data. For example, ID: 002_S_0413, what is the relevant RID? Thank you!
04/16/15

My questions are related to pre-processing fMRI data. Do we need each individual T1 image to pre-process each fMRI (DICOM) file? Are you aware of any study that has pre-proces...
04/13/15

Dear experts, I have contacted you on march 26th because I suspected some errors in the DB. I haven't yet received an answer. I think I have discovered another kind of e...
04/07/15

Hi,experts! I have noticed that fMRI QC file contains the time series information. but I didnot find it in LONI. Could you tell me how and where to find it? Thank you.
03/26/15

My research lab has not had to process MRI scans before, and after doing a lot of research I could only find brain extraction programs that required knowledge of coding. I wa...
03/10/15

Hi, I am wondering if you have resting state fMRI image we can pre-process ourselves? In the current MRI data, we only saw T1 data there. Thanks.
03/02/15

Hello! I am attempting to examine if atrophy of the central visual pathway structures (e.g. primary visual cortex, LGN if possible) is associated with increased behavioral dis...
02/26/15

When running the 2 x MPRage sequences, is there a preference as to which one is better / more important. I have been looking at these two sequences and can't decide which wou...
02/16/15

Hi ADNI MRI Core, I am trying to analyze resting state fMRI data. I have the following questions from my co-investigator / researcher on my team. Are the fMRI scans in the...
02/14/15

Hi, I would like to know why all images don't go through all the same processing steps (MPR; GradWarp; B1 Correction; N3; Scaled). Are they comparable even though they didn...
01/07/15

Hi, I found this answer in a previous topic (http://adni.loni.usc.edu/support/experts-knowledge-base/question/?QID=187): "Response posted 02/26/14 by Bret Borowski: Tha...
01/07/15

Hi, I would like to know if there is a quality check on every MRI available on the database (meaning that images who didn't pass the quality test are not uploaded on the data...
01/07/15

I'm trying to get detailed information about the DTI scan parameters for the Effects of TBI & PTSD on Alzheimer's Disease in Vietnam Vets (ADNIDOD) Data, to which I've been gr...
11/18/14

Thank you for your previous response about downloading DICOM files. I have checked what you said, but I had another problem! In the database series, there are Fractional Ani...
11/06/14

There appear to be two structural MRI scans per subject in the ADNI-Go. Which do you recommend I use for further analysis, with and without GRAPPA2/SENSE2/Accelerated?
10/17/14

I have downloaded T1,T2 and DTI images in NIfTI images from the ADNI website. As I go through the processing pipeline, I noticed that I need files for the b-values of each ima...
10/15/14

Dear Sir, I am a PhD student in computer science. I need MD images which are already coregistred with their corresponding structural MRIs. I have recently downloaded the MD...
10/09/14

kindly let us know what would be the ideal parameters for capturing B0 calibration for ASl quantification in siemens skyra
08/02/14

Could you please walk me through image naming? For example, here is a T1 file name: ADNI_002_S_0413_MR_MT1__N3m_Br_20110701095117041_S111989_I242896.nii 002_S_0413=su...
07/08/14

What was the program and version used to generate the values in table "UCSD derived volumes" for ADNI1?
06/12/14

Can you please explain how to get a list of pre processed T1 weighted images given subject ID list. I get a list of data with various descriptions, none of which says T1-weigh...
06/04/14

Cloud you please help me to understand the new description \\\"Extended Resting State fMRI \\\"?
05/19/14

Hi, I note that prospective motion correction has been applied for the rsfMRI series. I wonder if there is any way I can reconstruct the movement regressors to enter them as ...
05/19/14

Hi, is it possible to obtain the "raw" freesurfer output, i.e. the coordinates of the cortical surface segments? If yes, what are the dictionary entries where this data is s...
05/02/14

How can I get the name of the gradient coil of the scanner used to acquire a scan?
04/02/14

Hello I am a PhD student at IUPUI and I process the resting state scans so that we can extract various rs-networks but during QC have noticed that there is an artifact that h...
04/01/14

(Sorry for second issue, the form doesn't like messages past a certain length) We also have a scan that may be a scanner change, again with a series that has an unusual series...
02/26/14

We're downloading sequences for processing at the DRC and have encountered some scans with previously unknown series descriptions: ADNI_073_S_2182 ADNI2 V11 "MPRAGE GRAPPA2_S...
02/26/14

In several patient studies, instead of MPRAGE and MPRAGE GRAPPA2, there are sequences labeled SAG MPRAGE NO ANGLE and SAG MPRAGE GRAPPA2 NO ANGLE. What is the difference betwe...
02/19/14

When I download DTI images in NIFTI format, there are 46 NIFTIs that should include 5 B0 and 41 diffusion weighted images. However, I am wondering which images correspond to w...
01/30/14

I have another question on the diffusion gradient table. As I was looking at the table at http://adni.loni.usc.edu/support/experts-knowledge-base/question/?QID=97 , I could n...
01/29/14

How can I find the b-value of the DTI images (Axial DTI)?
01/29/14

where is the most recent grey matter volume data for ADNIGO and 2? Thanks.
01/02/14

Dear ADNI experts, I have searched for patients with fMRI data and found that sometimes there are more than one image set for one patient in one scan. I do not understand wha...
12/13/13

I find that during different scan time, the parements are different. TE may vary from 68.3 to 68.6, while TR may fluctuate from 9150 to 13000. I am confused whether those subj...
12/02/13

Dear Expert, I have downloaded the resting fMRI data with nifit style. For each file, we have 140 nii files, However, I do not know which file is the first time piont, which...
11/18/13

Hi, I'm a university student in CUHK, and I'm working on my project research. I'm having trouble finding the gradient table for the DTI scans from the Database. Could you p...
11/06/13

Can you clarify the meaning of images designated as MT1 ?
11/05/13

Hi, How may I locate all (MCI, EMCI, LMCI) patients who had an initial MRI scan as well as follow-up scans at 24months and/or later across all ADNI cohorts, please? Thanks ...
10/30/13

The csv file for Complete 3Yr 1.5T image set has images repeated at the same visit. Are these separate acquisitions, or different processing ? How are the markings, MPR/ MPR-R...
10/23/13

How can I search for images of subjects in the Cognitively Normal category?
10/18/13

Dear Experts, I am a graduate students from UNC. My current project studies the MRI images from ADNI. I don't have enough background in medical imaging ( I am CS major). ...
09/25/13

We are obtaining hippocampal and entorhinal cortex volumes from the ADNIMERGE file for baseline MRIs from subjects in ADNI-1. It appears that these were obtained from the UCS...
08/13/13

Dear ADNI experts, I was wondering what the slice scan aquisition is for the resting fMRI data? (up, down, interleaved?) In the settings provided, it says "default" and I ...
08/11/13

i was looking for the variables of MRI, and i donÂ´t understand if measured diffussion, mapping ADC, I WOULD LIKE TO RECEIVE instructions about, how to understand the databa...
08/11/13

whether the 'MPRAGE repete' is just repeted to the 'MPRAGE' of a subject? Wether they have some difference ?
06/29/13

Dear sir or madam I am interested in the T1 MRI data of AD, LMCI EMCI and normal patients, are the descriptions that MPRAGE, MP-RAGE, ADNI MPRAGE and ADNI new MPRAGE same ? ...
06/26/13

I'm viewing the axial T2 star MRI and most of them are blur, can you please tell me what might be the problem? secondly are T2 star MRI available for ADNI-1 subjects?
06/07/13

where can I find the MRI images of the subjects who were enrolled in ANDI-2 as new subjects.
06/05/13

I saw "Axial DTI", "Average DC", and "Fractional Aniso." in describing DTI images. What's the difference between them since the sequence info looks the same? (only difference ...
05/13/13

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