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Differential diagnosis of solid renal tumors by MRI. Comparison of In Situ relaxation times measured with a 0.1 T imager and histological findings
Author(s) -
Takeda Masayuki,
Katayama Yasushi,
Tsutsui Toshiki,
Komeyama Takeshi,
Mizusawa Takaki,
Saito Kazuhide,
Takahashi Hitoshi,
Tamaki Makoto,
Sato Shotaro
Publication year - 1993
Publication title -
nmr in biomedicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.278
H-Index - 114
eISSN - 1099-1492
pISSN - 0952-3480
DOI - 10.1002/nbm.1940060508
Subject(s) - pathological , renal cortex , magnetic resonance imaging , medicine , renal medulla , kidney , medulla , renal cell carcinoma , cortex (anatomy) , pathology , differential diagnosis , urology , nuclear medicine , radiology , biology , neuroscience
The T 1 and T 2 of kidneys in 5 normal volunteers and 27 patients with renal tumors were evaluated preoperatively using a magnetic resonance imager with a 0.1 T resistive electromagnet, and the T 1 and T 2 of the renal tumors were compared with the pathological findings: (i) the T 1 and T 2 of the normal renal medulla were longer than those of the normal renal cortex and psoas muscle; (ii) both T 1 and T 2 of renal pelvic cancer (RPC) were shorter than those of renal cell cancer (RCC, p<0.05); (iii) the T 2 values of RPC were significantly shorter than those of renal medulla (P<0.01); (iv) the T 1 and T 2 of the normal renal cortex of subjects <50 years old were shorter than those of subjects ⩾50 years old (p<0.05 and p<0.01, respectively). These findings suggest that preoperative evaluation of the pathological findings of renal tumors may be possible by calculating the relaxation time using MRI under low magnetic field.