OC-0547: Reproducible tumour position in voluntary visually guided inspiration breath hold lung cancer IGRT

Evaluation of target and cardiac position during visually monitored deep inspiration breath‐hold for breast radiotherapy

A low-resource visually monitored deep inspiration breath-hold (VM-DIBH) technique was successfully implemented in our clinic to reduce cardiac dose in left-sided breast radiotherapy. In this study, we retrospectively characterized the chest wall and heart positioning accuracy of VM-DIBH using cine portal images from 42 patients. Central chest wall position from field edge and in-field maximum ...

Single 20-second acquisition of deep-inspiration breath-hold PET/CT: clinical feasibility for lung cancer.

UNLABELLED This study was designed to compare tumor (18)F-FDG uptake between a single 20-s acquisition of deep-inspiration breath-hold PET/CT and free-breathing PET/CT for lung cancer. METHODS Before the clinical study, a phantom study was performed to determine the optimum breath-hold time for the PET scan. We studied 47 patients with lung cancer who underwent free-breathing PET/CT with the ...

Voluntary Deep Inspiration Breath Hold vs. Free Breathing in Left Breast Radiotherapy

Audiovisual biofeedback guided breath-hold improves lung tumor position reproducibility and volume consistency

Purpose Respiratory variation can increase the variability of tumor position and volume, accounting for larger treatment margins and longer treatment times. Audiovisual biofeedback as a breath-hold technique could be used to improve the reproducibility of lung tumor positions at inhalation and exhalation for the radiation therapy of mobile lung tumors. This study aimed to assess the impact of a...

A gated deep inspiration breath‐hold radiation therapy technique using a linear position transducer

For patients with thoracic and abdominal lesions, respiration-induced internal organ motion and deformations during radiation therapy are limiting factors for the administration of high radiation dose. To increase the dose to the tumor and to reduce margins, tumor movement during treatment must be minimized. Currently, several types of breath-synchronized systems are in use. These systems inclu...