Breath-hold three-dimensional CT of the liver with multi-detector row helical CT

PURPOSE: To compare image quality on transverse source images and coronal a nd sagittal reformations to determine the feasibility of using single-breat h-hold three-dimensional liver computed tomography (CT) with multi-detector row helical CT in patients suspected of having hepatic metastases. MATERIALS AND METHODS: Fifty-three patients underwent the protocol. Coronal and sagittal reformations were constructed. Images were reviewed for durat ion of scan acquisition and length and adequacy of z-axis coverage. Reforma tions were scored for visualization of portal and hepatic vein branches, li ver edge sharpness, cardiac pulsation and respiratory motion artifacts, noi se due to mottle, and overall impression. RESULTS: Mean z-axis coverage was 207 mm +/- 33 (SD) (range, 145-280 mm), w ith a mean acquisition time of 10.96 seconds +/- 1.78 (range, 7.73-14.93 se conds). In 44 (83%) patients, the entire liver was imaged on a single helic al scan. Artifact from cardiac motion was not identified on the transverse source images in any patient but was identified on coronal images in eight (15%) and on sagittal images in seven (13%). Similarly, noise due to mottle was not identified on the transverse source images but was identified on c oronal images in seven (13%) patients and on sagittal images in six (11%). CONCLUSION: It is feasible to perform single-breath-hold three-dimensional liver CT with multi-detector row helical CT technology. Reformations provid e a unique perspective with which to view the liver and may improve diagnos tic capacity.