Takahashi K, Honda M, Okubo R S, Hyodo H, Takakusaki H, Yokoyama H, Ohsawa T
Department of Radiology, Jichi Medical School and Hospital, Tochigi-ken, Japan.
J Comput Assist Tomogr. 1993 Jan-Feb;17(1):98-101. doi: 10.1097/00004728-199301000-00018.
In six small renal angiomyolipomas (7-17 mm) the superiority of displaying the CT numbers of pixels within a lesion (pixel mapping) over the usual region of interest (ROI) measurement is described in the detection of small amounts of fat tissue. On precontrast 5 mm CT the ROI measurements were > 0 in four cases whereas pixel maps revealed pixels with values < 0 in six cases.