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Evaluation of kidney motion with and without a pneumatic abdominal compression belt: Considerations for stereotactic radiotherapy
Author(s) -
West Kimberley,
Russo Majella,
Brown Elizabeth,
Barry Tamara,
Hargrave Cathy,
Pryor David
Publication year - 2018
Publication title -
journal of medical imaging and radiation oncology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 43
eISSN - 1754-9485
pISSN - 1754-9477
DOI - 10.1111/1754-9485.12681
Subject(s) - medicine , nuclear medicine , compression (physics) , breathing , abdomen , kidney , displacement (psychology) , radiology , anatomy , psychology , materials science , composite material , psychotherapist
The optimal delivery of stereotactic radiotherapy for kidney tumours requires an effective motion management strategy. This study assessed the effectiveness of a pneumatic abdominal compression belt in reducing kidney motion during free breathing. Methods Thirteen patients, with four‐dimensional computed tomography (4 DCT ) of the abdomen in free breathing with and without a pneumatic abdominal compression belt, were retrospectively reviewed. Points of Interest ( POI ) were placed on each kidney to determine the greatest magnitude of displacement in all directions. Results Without compression, all patients had >5.0 mm motion in the craniocaudal ( CC ) direction in at least one kidney. Median CC excursion of the left superior pole was reduced with compression from 8.0 mm (range 2.0 mm–18.0 mm) to 4.0 mm (range 2.0 mm–10.0 mm, P = 0.047) and right superior pole from 10.0 mm (range 4.0 mm–16.0 mm) to 6.0 mm (range 2.0 mm–10.0 mm, P =value 0.051). A benefit was less evident for the left and right inferior poles with median CC excursion of 6.0 mm versus 4.0 mm and 5.0 mm versus 4.0 mm without and with compression, respectively. Median displacement in the anteroposterior direction (≤3.2 mm) and lateral directions (≤1.3 mm) was similar for left and right kidneys and not significantly altered by compression. Overall, seven patients had kidney motion reduced by >5.0 mm with two reduced by 10.0 mm. Conclusion A pneumatic abdominal compression belt reduced kidney motion by >5.0 mm in seven of thirteen patients. The relative benefit is patient and location specific and should be assessed on an individual basis.