GSTM1 and neoplasm: As was seen for the 75-minute study, the intra-tumour CoVs for measurements acquired after re-positioning the animals was higher for the haemoglobin components (Hb: 22.0±6.0%; HbO2: 40.0±11.0%; HbT: 28.1±5.1%) than for blood sO2 (22.0 ± 21.2% and 15.0 ± 11.3% with and without considering position 2 imaging for animal 4, respectively).