Considering that recumbency can lead to a change in localization, detectability of distinct margins and thus measurement of the organs and reconstruction quality, it is of value to evaluate the effect of positioning on the objective evaluation of abdominal organs in computed tomography (CT). The objective of the present study was to evaluate the effect of patient decubitus on adrenal gland CT biometry. For this purpose, 6 clinically healthy adult beagle dogs underwent CT examination in 4 recumbencies. The various adrenal gland's size measurements were performed by 2 observers. Statistical analyses revealed that repeatability and reproducibility was the highest on the ventral and right lateral recumbencies, respectively. Significant differences were found in the left adrenal gland's length between the different positions (P < 0.001) and the left adrenal gland's width of the cranial pole measured in the dorsal plane (P < 0.04). The measurements on the parasagittal images differed significantly for the left adrenal length (P = 0.01), cranial pole height (P = 0.03), the right adrenal gland's lateral limb's length (P = 0.05) and medial limb's caudal poles height (P < 0.01). The caudal pole height of the right adrenal gland's medial limb was significantly different (P < 0.01) in all positions on the transverse images. In addition, the adrenal position differed significantly, except for the left adrenal gland relative to the nearest renal vessel (P = 0.1). According to these results, it is recommended to perform a CT of adrenal glands always in the same recumbency. If adrenal glands are evaluated on images taken in various recumbencies, we suggest relying on the measurements made on transverse plane images.

考虑到卧位会导致定位改变，不同边缘的可检测性并进而测量器官和重建质量，因此在计算机断层扫描（CT）中评估定位对腹部器官客观评估的影响是有价值的。本研究的目的是评估褥疮对肾上腺CT生物测定的影响。为此，对6只临床健康的成年比格犬进行了4次卧床CT检查。两名肾上腺观察各种肾上腺的大小。统计分析表明，腹侧和右侧卧位的重复性和重现性最高。在左肾上腺中发现显着差异<0.001）和在背侧测量的颅骨极点的左肾上腺宽度（P <0.04）。矢状旁旁图像的测量结果在左肾上腺长度（P = 0.01），颅骨高（P  = 0.03），右肾上腺外侧肢长（P = 0.05）和内侧四肢尾极高（P <0.01 ）。在横断面图像上的所有位置，右肾上腺内侧肢的尾极高度均显着不同（P <0.01）。此外，除了相对于最近的肾血管的左肾上腺外，肾上腺位置也有显着差异（P= 0.1）。根据这些结果，建议始终以相同的仰卧位进行肾上腺CT检查。如果对各种横卧拍摄的图像评估肾上腺，我们建议依靠对横断面图像进行的测量。