This question is probably stupid but I am a computer science student so I don't know much about MRI's literature.
I have read some studies on MRI preprocessing and in each the authors talk about 3D images. But when I asked a doctor to show me MRIs, he showed me a list of 2D images. Do I have to build a 3D image from the 2D images? Should I ask the doctor for the 3D images?
Thank you in advance!
Actually we can and often do true 3D acquisitions in MRI. In that case a thick slab is excited and phase-encoding is applied in two dimensions. MPRAGE images, for example, are usually acquired this way. Since the data is 3D, a 3D- FFT is used to reconstruct the images. But DICOM files are basically 2D, so the scanner software saves the 3D data as a series of 2D images. Whether the data was truly acquired as 3D or a set of 2D slices as Bazhdar described, most DICOM views will group the "slices" and display the data as a 3D volume.
@ Pierre Carceller--Meunier
In MRI if you deal with thin slice only,it means 2D(image of a single slice), If you do this many times, you can create a group of slices that all together build a 3D volume. This is called M2D (multiple 2D).
Okay, that's what I thought! Thank you for that very clear answer! You help me a lot
Actually we can and often do true 3D acquisitions in MRI. In that case a thick slab is excited and phase-encoding is applied in two dimensions. MPRAGE images, for example, are usually acquired this way. Since the data is 3D, a 3D- FFT is used to reconstruct the images. But DICOM files are basically 2D, so the scanner software saves the 3D data as a series of 2D images. Whether the data was truly acquired as 3D or a set of 2D slices as Bazhdar described, most DICOM views will group the "slices" and display the data as a 3D volume.
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