Comparing the supine and erect pelvis radiographic examinations: an evaluation of anatomy, image quality and radiation dose
| Autor: | Andrew England, Beverly Snaith, Kholoud Alzyoud, K. Flintham, Peter Hogg |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Male
medicine.medical_specialty Supine position Image quality Radiography Radiation Dosage Osteoarthritis Hip 030218 nuclear medicine & medical imaging Body Mass Index Pelvis 03 medical and health sciences 0302 clinical medicine RZ medicine Supine Position Humans Radiology Nuclear Medicine and imaging Prospective Studies Aged 030222 orthopedics Full Paper business.industry Phantoms Imaging Radiation dose General Medicine Middle Aged Arthralgia medicine.anatomical_structure Functional anatomy Standing Position Female Radiology business RA Software RC |
| Zdroj: | Br J Radiol |
| ISSN: | 0007-1285 |
| Popis: | Objectives: Pelvis radiographs are usually acquired supine despite standing imaging reflecting functional anatomy. We compared supine and erect radiographic examinations for anatomical features, radiation dose and image quality. Methods: 60 patients underwent pelvis radiography in both supine and erect positions at the same examination appointment. Measures of body mass index and sagittal diameter were obtained. Images were evaluated using visual grading analysis and pelvic tilt was compared. Dose–area product values were recorded and inputted into the CalDose_X software to estimate effective dose (ED). The CalDose_X software allowed comparisons using data from the erect and supine sex-specific phantoms (MAX06 & FAX06). Results: Patient sagittal diameter was greater on standing with an average 20.6% increase at the iliac crest (median 30.0, interquartile range [26.0 to 34.0] cm), in comparison to the supine position [24.0 (22.3 to 28.0) cm; p < 0.001]. 57 (95%) patients had posterior pelvic tilt on weight-bearing. Erect image quality was significantly decreased with median image quality scores of 78% (69 to 85) compared to 87% for the supine position [81 to 91] (p < 0.001). In the erect position, the ED was 47% higher [0.17 (0.13 to 0.33) mSv vs 0.12 (0.08 to 0.18) mSv (p < 0.001)], influenced by the increased sagittal diameter. 42 (70%) patients preferred the standing examination. Conclusion: Patient diameter and pelvic tilt were altered on weightbearing. Erect images demonstrated an overall decrease in image quality with a higher radiation dose. Optimal acquisition parameters are required for erect pelvis radiography as the supine technique is not directly transferable. |
| Databáze: | OpenAIRE |
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