Dose Optimization in Lumbar Spine Radiographic Examination by Air Gap Method at CR and DR Systems: A Phantom Study

2015 ◽  
Vol 46 (1) ◽  
pp. 65-77 ◽  
Author(s):  
Charles T.P. Chan ◽  
Karl K.L. Fung
2014 ◽  
Vol 13 (3) ◽  
pp. 188-192
Author(s):  
Débora Pinheiro Lédio Alves ◽  
Vera Lúcia dos Santos Alves ◽  
Osmar Avanzi

OBJECTIVE: To analyze the clinical and radiographic changes in patients with postural rounded upper back. METHODS: 30 patients diagnosed with postural rounded upper back were studied, being 22 male and eight female, aged between 10 and 20 years, referred by the outpatient clinic of the Grupo de Cirurgia da Coluna of the Irmandade da Santa Casa de Misericórdia de São Paulo, SP, Brazil. Patients underwent assessment of posture, special tests to check for muscle retractions and radiographic examination to measure the curvatures of spine using the Cobb method. RESULTS/CONCLUSION: It is concluded that in the postural roundback there is a moderate increase of the thoracic kyphosis; the lumbar and cervical curvatures do not increase as a compensatory mechanism; the head appears anteriorized and the shoulder is also anteriorized and medially rotated; muscle retractions are present in the hamstrings, hip flexors, pectoralis minor and adductors of the shoulder muscles; the mobility of the lumbar spine is preserved and there is no relationship between the magnitude of thoracic curvature and the retraction of the hamstring muscles.


2020 ◽  
Vol 101 (5) ◽  
pp. 289-297 ◽  
Author(s):  
J. Greffier ◽  
S. Boccalini ◽  
J.P. Beregi ◽  
A. Vlassenbroek ◽  
A. Vuillod ◽  
...  

Author(s):  
Sevtap Arslan ◽  
Mehmet Ruhi Onur ◽  
Yasin Sarıkaya ◽  
H. Nursun Özcan ◽  
Mithat Haliloğlu ◽  
...  

2020 ◽  
Vol 190 (4) ◽  
pp. 419-426
Author(s):  
Nada A Ahmed ◽  
E H Basheir ◽  
A B Farah ◽  
T S Mohammedzein ◽  
I I Suliman

Abstract This study aimed to calculate patient radiation doses for adults during the seven most commonly performed conventional X-ray procedures, and to propose national diagnostic reference levels (DRLs). A representative sample of patients from 29 hospitals was included. The entrance surface air kerma (ESAK) was calculated by measuring X-ray tube output and the corresponding technical and exposure factors for each patient. Third-quartile values of the mean ESAK distributions were proposed as DRL values. The DRLs in mGy were as follows: 0.6 for chest postero–anterior (PA), 3.5 for skull AP, 1.7 for skull lateral (LAT), 2.7 for abdominal, 2.6 for pelvic AP, 3.7 for lumbar spine AP and 8 for lumbar spine LAT. Compared with literature, the maximum percentages increase were in chest PA (329%) and skull AP (187%). Since the suggested DRL for chest PA was higher than literature values, dose optimization and a review of its value is recommended.


2012 ◽  
Vol 39 (6Part2) ◽  
pp. 3608-3608
Author(s):  
K Brown ◽  
P Kalapos ◽  
D Nguyen ◽  
K Thamburaj ◽  
T Rahman

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