Changes in the size and location of kidneys from the supine to standing positions and the implications for block placement during total body irradiation

Jay E. Reiff, Maria Werner-Wasik, Richard K Valicenti, M. Saiful Huq

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Purpose: The use of total body irradiation (TBI) as a conditioning regimen for bone marrow transplantation often calls for partial transmission kidney blocks. These blocks are frequently designed based on the location of the kidneys during the abdominal computerized tomography (CT) scan. At our institution, TBI patients are treated in the standing position. As the kidneys can shift with different patient positions, a study was undertaken to evaluate the magnitude of the changes in the size and location of the kidneys from the supine CT position to the upright treatment position. Methods and Materials: Intravenous contrast was administered to 15 patients. The patients were initially positioned supine on a simulator table and then positioned upright immediately in front of the image intensifier. PA radiographs were obtained with the patients in both positions. Changes in the size of the kidneys and their location relative to the vertebral bodies were noted. Results: In going from the supine to upright position, all the kidneys shifted inferiorly between 0.5 cm and 7.5 cm with an average of 3.6 cm. Most of the kidneys also shifted in the transverse dimension and incurred a change in width. The range of the transverse shift was from 0.9 cm in the lateral direction to 4.9 cm medially. The maximum width broadening was 1.2 cm and the maximum decrease in width was 1.8 cm. Conclusions: When compared to the supine position, patients in the upright position show a dramatic inferior shift of the kidneys with other obvious, but less predictable, changes. For TBI treatments delivered in the upright position, kidney blocks should not be designed on the basis of supine abdominal CT scans. Copyright (C) 1999 Elsevier Science Inc.

Original languageEnglish (US)
Pages (from-to)447-449
Number of pages3
JournalInternational Journal of Radiation Oncology Biology Physics
Volume45
Issue number2
DOIs
StatePublished - Sep 1 1999
Externally publishedYes

Fingerprint

Whole-Body Irradiation
kidneys
Posture
Kidney
irradiation
Tomography
tomography
shift
supine position
Supine Position
transplantation
Bone Marrow Transplantation
image intensifiers
bone marrow
Contrast Media
conditioning
simulators
Therapeutics

Keywords

  • Kidney motion
  • Total body irradiation

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Radiation

Cite this

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title = "Changes in the size and location of kidneys from the supine to standing positions and the implications for block placement during total body irradiation",
abstract = "Purpose: The use of total body irradiation (TBI) as a conditioning regimen for bone marrow transplantation often calls for partial transmission kidney blocks. These blocks are frequently designed based on the location of the kidneys during the abdominal computerized tomography (CT) scan. At our institution, TBI patients are treated in the standing position. As the kidneys can shift with different patient positions, a study was undertaken to evaluate the magnitude of the changes in the size and location of the kidneys from the supine CT position to the upright treatment position. Methods and Materials: Intravenous contrast was administered to 15 patients. The patients were initially positioned supine on a simulator table and then positioned upright immediately in front of the image intensifier. PA radiographs were obtained with the patients in both positions. Changes in the size of the kidneys and their location relative to the vertebral bodies were noted. Results: In going from the supine to upright position, all the kidneys shifted inferiorly between 0.5 cm and 7.5 cm with an average of 3.6 cm. Most of the kidneys also shifted in the transverse dimension and incurred a change in width. The range of the transverse shift was from 0.9 cm in the lateral direction to 4.9 cm medially. The maximum width broadening was 1.2 cm and the maximum decrease in width was 1.8 cm. Conclusions: When compared to the supine position, patients in the upright position show a dramatic inferior shift of the kidneys with other obvious, but less predictable, changes. For TBI treatments delivered in the upright position, kidney blocks should not be designed on the basis of supine abdominal CT scans. Copyright (C) 1999 Elsevier Science Inc.",
keywords = "Kidney motion, Total body irradiation",
author = "Reiff, {Jay E.} and Maria Werner-Wasik and Valicenti, {Richard K} and Huq, {M. Saiful}",
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AU - Reiff, Jay E.

AU - Werner-Wasik, Maria

AU - Valicenti, Richard K

AU - Huq, M. Saiful

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N2 - Purpose: The use of total body irradiation (TBI) as a conditioning regimen for bone marrow transplantation often calls for partial transmission kidney blocks. These blocks are frequently designed based on the location of the kidneys during the abdominal computerized tomography (CT) scan. At our institution, TBI patients are treated in the standing position. As the kidneys can shift with different patient positions, a study was undertaken to evaluate the magnitude of the changes in the size and location of the kidneys from the supine CT position to the upright treatment position. Methods and Materials: Intravenous contrast was administered to 15 patients. The patients were initially positioned supine on a simulator table and then positioned upright immediately in front of the image intensifier. PA radiographs were obtained with the patients in both positions. Changes in the size of the kidneys and their location relative to the vertebral bodies were noted. Results: In going from the supine to upright position, all the kidneys shifted inferiorly between 0.5 cm and 7.5 cm with an average of 3.6 cm. Most of the kidneys also shifted in the transverse dimension and incurred a change in width. The range of the transverse shift was from 0.9 cm in the lateral direction to 4.9 cm medially. The maximum width broadening was 1.2 cm and the maximum decrease in width was 1.8 cm. Conclusions: When compared to the supine position, patients in the upright position show a dramatic inferior shift of the kidneys with other obvious, but less predictable, changes. For TBI treatments delivered in the upright position, kidney blocks should not be designed on the basis of supine abdominal CT scans. Copyright (C) 1999 Elsevier Science Inc.

AB - Purpose: The use of total body irradiation (TBI) as a conditioning regimen for bone marrow transplantation often calls for partial transmission kidney blocks. These blocks are frequently designed based on the location of the kidneys during the abdominal computerized tomography (CT) scan. At our institution, TBI patients are treated in the standing position. As the kidneys can shift with different patient positions, a study was undertaken to evaluate the magnitude of the changes in the size and location of the kidneys from the supine CT position to the upright treatment position. Methods and Materials: Intravenous contrast was administered to 15 patients. The patients were initially positioned supine on a simulator table and then positioned upright immediately in front of the image intensifier. PA radiographs were obtained with the patients in both positions. Changes in the size of the kidneys and their location relative to the vertebral bodies were noted. Results: In going from the supine to upright position, all the kidneys shifted inferiorly between 0.5 cm and 7.5 cm with an average of 3.6 cm. Most of the kidneys also shifted in the transverse dimension and incurred a change in width. The range of the transverse shift was from 0.9 cm in the lateral direction to 4.9 cm medially. The maximum width broadening was 1.2 cm and the maximum decrease in width was 1.8 cm. Conclusions: When compared to the supine position, patients in the upright position show a dramatic inferior shift of the kidneys with other obvious, but less predictable, changes. For TBI treatments delivered in the upright position, kidney blocks should not be designed on the basis of supine abdominal CT scans. Copyright (C) 1999 Elsevier Science Inc.

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