Magnetic resonance maps for analyzing tissue

Apparatus for operating MRI, comprising:

• an MRI Scanner configured for performing a 3D MRI scan;
• an input for receiving first and second MRI scans of an organ of a subject respectively at the beginning and end of a predetermined time interval post contrast administration from said MRI scanner;
• a subtraction map former for forming a subtraction map from said first and said second MRI scans by analyzing said scans to distinguish between two primary populations, a slow population, in which contrast clearance from the tissue is slower than contrast accumulation, and a fast population in which clearance is faster than accumulation;
• and
• an output to provide an indication of distribution of said two primary populations, wherein said control is configured to carry out said first scan and said second scan such that said predetermined time period is at least twenty minutes.

Method for analyzing MRI of an organ of a subject, comprising:

• receiving a first and a second MRI scan at the beginning and end of a predetermined time interval post contrast administration, wherein the time interval begins at least five minutes and no more than ten minutes post contrast injection;
• forming a subtraction map from said first and said second MRI scans by analyzing said scans to distinguish between two primary populations, a slow population, in which contrast clearance from the tissue is slower than contrast accumulation, and a fast population in which clearance is faster than accumulation;
• and
• providing an indication of distribution of said two primary populations, wherein said predetermined time period is at least twenty minutes.

Method for analyzing MRI of an organ of a subject, comprising:

• receiving a first and a second 3D MRI scan at the beginning and end of a predetermined time interval post contrast administration;
• forming a subtraction map from said first and said second 3D MRI scans by analyzing said scans to distinguish between two primary populations, a slow population, in which contrast clearance from the tissue is slower than contrast accumulation, and a fast population in which clearance is faster than accumulation;
• and
• providing an indication of distribution of said two primary populations, wherein said predetermined time period is at least twenty minutes.