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Related Experiment Videos

Kidney mobility during respiration

L H Schwartz1, J Richaud, L Buffat

  • 1Département de Radiothérapie, Hôpital Tenon, Paris, France.

Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology
|July 1, 1994
PubMed
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Kidney motion during respiration was quantified using MRI, revealing significant vertical movement up to 43 mm. This data supports using respiration-gated radiation therapy for tumors near the kidneys to minimize radiation exposure.

Area of Science:

  • Medical Imaging
  • Radiation Oncology
  • Anatomy

Background:

  • Accurate radiotherapy treatment planning requires precise definition of target volumes relative to normal tissues.
  • Kidney motion during respiration is not well-quantified, impacting treatment accuracy.
  • Kidneys exhibit movement in tilted coronal and sagittal planes during breathing.

Purpose of the Study:

  • To quantify kidney motion during respiration using fast MRI.
  • To assess the reproducibility of kidney position during breathing phases.
  • To inform radiotherapy planning for tumors adjacent to the kidneys.

Main Methods:

  • Fast MRI scans were performed on 14 volunteers.
  • Kidney positions were captured in axial and coronal planes during deep inspiration and expiration.

Related Experiment Videos

  • Maximal vertical and mean dimensional movements were calculated.

    • Main Results:

    • Maximal vertical kidney motion ranged from 39 mm (superior pole) to 43 mm (inferior pole).
    • Kidney positions were reproducible in deep inspiration and expiration.
    • Mean deviation in kidney movement was under 4 mm across all dimensions (0-6.9 mm range).

    Conclusions:

    • Significant kidney motion occurs during respiration, necessitating consideration in radiotherapy planning.
    • Respiration-gated radiation therapy is recommended for tumors near the kidneys.
    • Minimizing movement of the radiosensitive kidney structure is crucial for effective treatment.