Hi Gonzalo,

indeed, here are the references Bruce is refering to: http://www.ncbi.nlm.nih.gov/pubmed/19233293 http://www.ncbi.nlm.nih.gov/pubmed/16651008

Image contrast to noise ratio per unit time of acquisition is different because of different T1s and lower SNR. Different scan durations will also give different head motion biases. Then differences can also increase depending on protocol and scanner model/vendor differences. It is in general cleaner to not mix data from multiple fields. If you have large numbers and well balanced cohorts you can test for differences in healthy controls.

Jorge

On 06/06/2016 17:40, Bruce Fischl wrote:

Hi Gonzalo

we seek to minimize these explicitly, but given the difference in T1s at different field strength it's pretty hard to get rid of them completely. Xiao Han wrote a paper on this, and I think Jorge Jovicich did as well

cheers Bruce

On Mon, 6 Jun 2016, Gonzalo Rojas Costa wrote:

...

Hi:

There exist any difference between the volumetric values obtained using 1.5T and 3.0T images ? Any paper about it ?

Sincerely,

Gonzalo Rojas Costa Laboratory for Advanced Medical Image Processing Department of Radiology Clínica las Condes Lo Fontecilla 441, Las Condes, Santiago, Chile. Tel: 56-2-2105170 Cel: 56-9-97771785 www.clc.cl

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