Effect of technologist and patient attributes on centering for body CT examinations: Influence of cultural and ethnic factors.

Autor: Aly A; Hamad Medical Corporation, Doha, Qatar., Ebrahimian S; Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America., Kharita MH; Hamad Medical Corporation, Doha, Qatar., Heidous M; Hamad Medical Corporation, Doha, Qatar., Ashruf MZ; Hamad Medical Corporation, Doha, Qatar., Kumar D; Hamad Medical Corporation, Doha, Qatar., Kalra MK; Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America., Al Naemi HM; Hamad Medical Corporation, Doha, Qatar.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2022 Aug 19; Vol. 17 (8), pp. e0273227. Date of Electronic Publication: 2022 Aug 19 (Print Publication: 2022).
DOI: 10.1371/journal.pone.0273227
Abstrakt: There are no published data on the effect of patient and technologist gender and ethnicity attributes on off-centering in CT. Therefore, we assessed the impact of patient and technologist variations on off-centering patients undergoing body CT. With institutional review board approval, our retrospective study included 1000 consecutive adult patients (age ranged 22-96 years; 756 males: 244 females) who underwent chest or abdomen CT examinations. We recorded patient (age, gender, nationality, body weight, height,), technologist gender, and scan-related (scanner vendor, body region imaged, scan length, CT dose index volume, dose length product) information. Lateral and anteroposterior (AP) diameters were recorded to calculate effective diameter and size-specific dose estimate (SSDE). Off-centering represented the distance between the anterior-posterior centers of the scan field of view and the patient at the level of carina (for chest CT) and iliac crest (for abdomen CT). About 76% of the patients (760/1000) were off-centered with greater off-centering for chest (22 mm) than for abdomen (15 mm). Although ethnicity or patient gender was not a significant determinant of off-centering, technologist-patient gender mismatch was associated with a significantly greater frequency of off-centering (p<0.001). Off-centering below the gantry isocenter was twice as common as off-centering above the gantry isocenter (p<0.001). The latter occurred more frequently in larger patients and was associated with higher radiation doses than those centered below the isocenter (p<0.001). Technologists' years of experience and patient factors profoundly affect the presence and extent of off-centering for both chest and abdomen CTs. Larger patients are more often off-centered than smaller patients.
Competing Interests: A study coauthor (Mannudeep K. Kalra) received research grants from Siemens Healthineers, Riverain Tech, and Coreline Inc. for unrelated projects. None of the authors have any pertinent financial disclosures related to the submitted work. This does not alter our adherence to PLOS ONE policies on sharing data and materials.
Databáze: MEDLINE
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