Thoracic Imaging Division, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, United States of America.
Department of Imaging, Dana Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215, United States of America.
Clin Imaging. 2020 Feb;59(2):154-156. doi: 10.1016/j.clinimag.2019.09.013. Epub 2019 Nov 29.
Computed tomography of the chest may be occasionally performed with the arm in mid extended position, in patients unable to fully raise their arms overhead. In such patients, a combination of beam hardening, incomplete projection and subtle motion artifacts may result in an appearance of diffuse cortical thickening and irregularity of the humerus. We describe this appearance as the 'hazy humerus artifact'. Radiologists must be aware of this appearance in order to avoid a misdiagnosis. The artifact can be minimized by having the arm positioned non-parallel to the plane of the gantry.
胸部计算机断层扫描偶尔可在手臂处于中间伸展位置时进行，适用于无法完全将手臂举过头顶的患者。在这些患者中，束硬化、不完全投影和细微运动伪影的组合可能导致肱骨弥漫性皮质增厚和不规则。我们将这种表现描述为“模糊肱骨伪影”。放射科医生必须意识到这种表现，以避免误诊。通过使手臂与机架平面不平行来最小化伪影。
