Forty-two patients with carcinoma of the bladder were examined by intravesical and transcutaneous sonography, as well as by computed tomography, in order to determine their T-classification. None of these methods permitted a distinction between T2 and T3a as recommended by the UICC (1978), with any degree of certainty. Intravesical sonography is best for defining superficial tumours. Transcutaneous sonography has proved satisfactory for differentiating muscle-infiltrating from extravesical tumours. Computed tomography shows infiltration of tumour into the perivesical fat and into neighbouring organs; infiltration of tumour into the prostate cannot always be demonstrated.
The system demonstrated a diagnostic accuracy comparable to human observers. Further improvement with increasing numbers of typical computed tomographic series for training of the classifier can be expected.
Pelvimetry by means of snapshot-FLASH-MRI was carried out during the last trimester in 20 pregnant women. In 10 cases the results were compared with conventional spin-echo and FLASH-MRI. Snapshot-FLASH-MRI resulted in identical measurements but in addition provided images free from motion artifacts with good contrast of bone and soft tissue structures. The reduction in acquisition time resulted in pelvimetry in a few seconds. The total examination time and comfort for the patient were thereby improved.
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