Effectiveness of a simple and real-time baseline shift monitoring system during stereotactic body radiation therapy of lung tumors

Uchida, Yukihiro; Tachibana, Hideki; Kamei, Yoshiyuki; Kashihara, Kenichi

doi:10.1016/j.ejmp.2017.11.001

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…There are several real-time tracking methods available to reduce the impact of tumour motion during dose delivery. 21,22 In respiratory gating method, radiation is delivered in a predetermined part of the breathing cycle in which target mobility is comparatively less. This is a very useful technique for the targets, which are highly mobile in nature.…”

Section: Introductionmentioning

confidence: 99%

Selection of patient for gated treatment based on the information from 4DCT imaging in stereotactic body radiotherapy of non-small cell lung cancer

et al. 2018

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PurposeStereotactic body radiotherapy (SBRT) is widely used for the treatment of stage-I non-small cell lung cancer (NSCLC). Patient-specific motion correlated with 4DCT could be essential for hypofractionated SBRT. All patients undergoing SBRT do not require motion management during the dose delivery. The objective of this study was to evaluate which patient may benefit from Gated SBRT.Materials and methodsTreatment planning of 20 patients of stage-I NSCLC was analysed. Conventional and 4DCT scans were taken. Internal target volume as well as planning target volume (ITV and PTV) were determined in the CT data sets. PTVall phases created using 4DCT data sets and PTV15mm created using conventional CT data were compared. Also, ITVall phases were compared with ITV created from maximum intensity projections (ITVMIP). Suitability of patients for motion management-based treatment delivery was also evaluated.ResultsThe average ITVMIP to ITVall phases ratio is 1·06 indicating good agreement between them. Based on the ratio of intensity projections, 9 out of 17 patients were found suitable for our existing gated treatment.Conclusion4D CT is the main requirement in SBRT to identify the patients who can benefit from motion management during the dose delivery.

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Section: Introductionmentioning

confidence: 99%

Selection of patient for gated treatment based on the information from 4DCT imaging in stereotactic body radiotherapy of non-small cell lung cancer

et al. 2018

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Application of discrete cosine transform to assess the effect of tumor motion variations on the definition of ITV in lung and liver SBRT

et al. 2021

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Quantitative analysis of the intra-beam respiratory motion with baseline drift for respiratory-gating lung stereotactic body radiation therapy

Yasue¹,

Fuse²,

Oyama³

et al. 2021

Journal of Radiation Research

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This study aimed to quantitatively clarify the baseline drift for each respiratory cycle in two respiratory-gating methods using the intra-beam respiratory motion data of lung cancer patients. The residual motion and dose distribution were calculated based on intra-beam respiratory motion data with the baseline drift. To quantify the baseline drift $\Delta$ during irradiation, it was defined as the inclination between the detected expiration point and the expiration point in the next cycle in the anterior–posterior (AP), cranial–caudal (CC) and left–right (LR) directions obtained using an in-house programme. The baseline drift value reached up to 0.74 mm/s in the CC direction as per the respiratory motion data of 10 patients. The homogeneity index (HI) of the phase-gating method tended to increase because the target was irradiated even when the amplitude position of the target differed from period to period. In contrast, the amplitude-gating method enabled irradiation considering the amplitude position of the target because the gating window was set considering the amplitude position of the respiratory motion. The respiratory-gating methods and respiratory phase in respiratory-gating lung stereotactic body radiation therapy (SBRT) must be determined based on the respiratory motion of the patients.

show abstract

Effectiveness of a simple and real-time baseline shift monitoring system during stereotactic body radiation therapy of lung tumors

Cited by 3 publications

References 32 publications

Selection of patient for gated treatment based on the information from 4DCT imaging in stereotactic body radiotherapy of non-small cell lung cancer

Selection of patient for gated treatment based on the information from 4DCT imaging in stereotactic body radiotherapy of non-small cell lung cancer

Application of discrete cosine transform to assess the effect of tumor motion variations on the definition of ITV in lung and liver SBRT

Quantitative analysis of the intra-beam respiratory motion with baseline drift for respiratory-gating lung stereotactic body radiation therapy

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