1040
Three classes of test objects were considered : ( 1 ) a multicompartment test object for 31P MRS measurements performed with slice - selective sequences ; ( 2 ) a two - compartment test object for volume - selection 1H MRS ; and ( 3 ) two - compartment test objects for assessing the performance of experimental systems using ISIS as volume localization sequence in 31P MRS .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None