[The demonstration of calcifications in magnetic resonance tomography (MRT). The effect of different parameters on the MRT imaging of cerebral calcifications].
The effect of various factors on the demonstration of calcified lesions was studied in 131 areas of calcification which had been demonstrated by CT. By means of MRI (SE 400/30 or GE315/14, 90 degrees and SE 1600/30 + 70; 0.5T) 117 of the 131 calcified lesions (89%) produced a signal difference. Of these 117 lesions, 80 (61%) were recognised as calcification by MRI. Large areas of calcification (more than 5 mm) and high density calcification (more than 100 Hu) were recognised significantly more often than small or low density calcifications. T2-weighted images demonstrated calcification more often than other sequences. With conventional pulse sequences, calcified lesions were frequently recognised as abnormalities on MRI, but their recognition as calcified lesions is unreliable.
Schörner
W
W
Radiologische Klinik und Poliklinik, Freie Universität Berlin.
Kunz
D
D
Henkes
H
H
Sander
B
B
Schmidt
D
D
Felix
R
R
D001921:Brain / Q000000981:diagnostic imaging / Q000473:pathology; D001927:Brain Diseases / Q000175:diagnosis*; D001932:Brain Neoplasms / Q000175:diagnosis; D002114:Calcinosis / Q000175:diagnosis*; D002561:Cerebrovascular Disorders / Q000175:diagnosis; D004660:Encephalitis / Q000175:diagnosis; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D014057:Tomography, X-Ray Computed
Nachweis von Verkalkungen in der Magnetresonanztomographie (MRT). Einfluss verschiedener Parameter auf die MRT-Darstellung zerebraler Verkalkungen.