title: A study of T1-weighted 31phosphorus MR-spectroscopy from patients with focal and diffuse liver disease.
abstract: 31P-MR-Spectroscopy was performed in 28 patients with focal (n = 23) and diffuse (n = 5) liver disease and in 18 healthy volunteers. The spectra were obtained with a whole body scanner operating at 1.5 T by using a surface coil. To get T1-weighted 31P-spectra a short TR of 600 msec was taken, because T1-weighted spectra of focal liver disease were more significantly different from spectra from healthy volunteers than density weighted ones. The VOI from patients with focal superficial alterations showed a mean volume of 172 ml, with diffuse liver disease 196 ml, and from volunteers 158 ml. Focal tumors filled up the VOI on an average of 70%. This investigation demonstrated that PME/beta-ATP- and PDE/beta-ATP-ratios were sensitive indicators for focal liver disease. As a result of this study we could establish a significant increase of PME/beta-ATP- (0.75 +/- 0.30) and PDE/beta-ATP-ratios (1.68 +/- 0.62) in patients with superficial focal liver metastases (n = 19) compared to the control group (PME/beta-ATP: 0.49 +/- 0.17, PDE/beta-ATP: 1.24 +/- 0.24; t-test: p < 0.02). Patients with a hemangioma (n = 1), liver infarction (n = 1), empyema of gallbladder (n = 1) and a hepatic involvement by a malignant lymphoma (n = 1) showed a similar increase of PME/beta-ATP and/or PDE/beta-ATP. Up to now spectral changes seemed to be non-specific. The ratios of 31P metabolites of the cirrhoses (n = 4) and the fatty liver (n = 1) did not show any characteristic changes versus the volunteers.
authors.affiliation: Department of Diagnostic Radiology, University of Kiel, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Brinkmann
authors.forename: U H
authors.initials: UH
authors.lastname: Melchert
mesh_terms: D000328:Adult; D000368:Aged; D005234:Fatty Liver / Q000175:diagnosis*; D005260:Female; D006391:Hemangioma / Q000175:diagnosis*; D006801:Humans; D007238:Infarction / Q000175:diagnosis*; D008099:Liver / Q000098:blood supply*; D008103:Liver Cirrhosis / Q000175:diagnosis*; D008113:Liver Neoplasms / Q000175:diagnosis / Q000556:secondary*; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D008875:Middle Aged