Avaliação da incidência pélvica por tomografia computadorizada
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Data
2020-03-18
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Universidade Federal de Goiás
Resumo
The Pelvic incidence (PI) is the most important pelvic parameter. It is considered a fixed, anatomical, parameter that is not influenced by the pelvis's position. However, the projection of the pelvis, a three-dimensional structure, in the radiographic, two-dimensional examination, may be influenced by its positioning in relation to the x-ray bulb during image acquisition. Our aim was to describe a new way of measuring PI using computed tomography (CT) and to evaluate the reliability and reproducibility of this measurement by comparing it with the total and lumbosacral spine radiogragphys. A retrospective study was carried out in which patients who underwent radiography of the total spine, lumbosacral spine and computed tomography (CT) of the total abdomen, pelvis or lumbar spine were included, with
a maximum interval of 3 months between examinations. Two independent examiners performed PI measurement, with each measurement being permorded twice, with an interval of two months betwenn assesmentes. To measure the pelvic incidence on CT, the image overlay technique was applied. SURGIMAP, Excel and IBM-SPSS 20.0 software were used to calculate IP, data tabulation and statistical analysis, respectively. The intra and inter-examiner validity and reproducibility were verified using the intraclass correlation coefficients (ICC), considering CI = 95%. During the study the examinations of 55 patients of both genders with an average age of 58.7 years (± 19) were analyzed. The mean PI in the analysis of both examiners at the two different times was 54.85° (± 13.73) on the total spine radiography, 54.06° (± 11.67) on the lumbosacral spine radiography, and 49, 96° (± 9.85) in the measurement using CT. There was good reliability and reproducibility both intra (ICC examiner 1 0,913 and ICC examiner 2 0,871) and inter-examiner (ICC avaliation 1 0,906 and ICC avaliation 2 0,824). High agreement was also found with the radiographs of the whole spine and lumbosacral spine. These findings suggest that it is possible to calculate PI using CT usind the image overlay technique, eith good reproducibility both intra and inter-observer.
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Palavras-chave
Tomografia , Lordose , Radiografia , Coluna vertebral , Pelve , Tomography , Lordosis , Radiography , Spine , Pelvis
Citação
DAHER, M. T. Avaliação da incidência pélvica por tomografia computadorizada. 2020. 83 f. Tese (Doutorado em Ciências da Saúde) - Universidade Federal de Goiás, Goiânia, 2020.