TY - JOUR
T1 - Automatic patient-instruction devices in thin-section CT of the thorax
T2 - Impact on image quality
AU - Bankier, Alexander A.
AU - Fleischmann, Dominik
AU - Dantendorfer, Karl
AU - Wiesmayr, Michael N.
AU - Kontrus, Manfred
AU - Hübsch, Peter
AU - Herold, Christian J.
PY - 1995/9
Y1 - 1995/9
N2 - PURPOSE: To determine what influence automatic patient-instruction (API) devices have on image quality of chest computed tomographic (CT) scans and whether the qualitative outcome justifies their routine use. MATERIALS AND METHODS: Thin-collimation CT scans of two age- and sex-matched groups of 64 patients each were evaluated prospectively for the presence of breathing artifacts and for concomitant deterioration of image quality. Breathing commands in group 1 were given with the API device and in group 2 with technologist-performed patient instruction. Cardiac motion artifacts were not evaluated. The frequency of scans repeated owing to breathing artifact was determined. RESULTS: Image quality was worse in group 1 compared with that of group 2. The percentage of scans repeated was higher with API (38%) than without API (16%). CONCLUSION: API devices cannot be recommended for thin- section CT of the thorax. The large number of scans that must be repeated leads to a considerable increase in patient irradiation, scanning time, and cost.
AB - PURPOSE: To determine what influence automatic patient-instruction (API) devices have on image quality of chest computed tomographic (CT) scans and whether the qualitative outcome justifies their routine use. MATERIALS AND METHODS: Thin-collimation CT scans of two age- and sex-matched groups of 64 patients each were evaluated prospectively for the presence of breathing artifacts and for concomitant deterioration of image quality. Breathing commands in group 1 were given with the API device and in group 2 with technologist-performed patient instruction. Cardiac motion artifacts were not evaluated. The frequency of scans repeated owing to breathing artifact was determined. RESULTS: Image quality was worse in group 1 compared with that of group 2. The percentage of scans repeated was higher with API (38%) than without API (16%). CONCLUSION: API devices cannot be recommended for thin- section CT of the thorax. The large number of scans that must be repeated leads to a considerable increase in patient irradiation, scanning time, and cost.
KW - Computed tomography (CT), image quality
KW - Computed tomography (CT), technology
KW - Thorax, CT
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U2 - 10.1148/radiology.196.3.7644653
DO - 10.1148/radiology.196.3.7644653
M3 - Article
C2 - 7644653
AN - SCOPUS:0029151405
SN - 0033-8419
VL - 196
SP - 841
EP - 844
JO - RADIOLOGY
JF - RADIOLOGY
IS - 3
ER -