Four-dimensional measurement of lung tumor displacement using 256-multi-slice CT-scanner

Mori, Shinichiro; Endo, Masahiro; Komatsu, Shuhei; Yashiro, Tomoyasu; Kandatsu, Susumu; Baba, Masayuki

doi:10.1016/j.lungcan.2006.11.011

Cited by 51 publications

(25 citation statements)

References 35 publications

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“…The number and length of breathing cycles agreed with previous studies and hence were representative of the population [3,10]. Longer breathing cycles in the LAT compared with the AP images occurred in two patients in this study, possibly because the images were acquired after the plan check procedure, which lasts ,20 min.…”

Section: Determining Motionsupporting

confidence: 88%

Fluoroscopy as a surrogate for lung tumour motion

McNair¹,

Kavanagh²,

Powell³

et al. 2012

BJR

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Objectives: The aim of this article was to test a simple approach of using pixel density values from fluoroscopy images to enable gated radiotherapy. Methods: Anterior and lateral (LAT) from images were acquired from 18 patients referred for radical radiotherapy for non-small cell lung cancer for a period of 30-45 s. The amplitude of movement and the number of breathing cycles were determined in the right-left (RL) and superoinferior (SI) directions on the anterior images and the anteroposterior (AP) and SI directions on the lateral images. The breathing pattern was created by analysing the variation in a summation of pixel values within a defined area. The greatest and lowest 30% of pixel values were set as the duty cycle to represent inhale and exhale amplitude-based gating. Results: A median of eight breathing cycles was captured for each patient with a duration of 2.2-11.8 s per cycle. The mean (range) motion was 4.7 mm (2.4-5.8 mm), 7.2 mm (2.3-17.6 mm), 6.2 mm (1.9-13.8 mm) and 4.8 mm (2.4-11.3 mm) in the RL, SI (AP), SI (LAT) and AP directions, respectively. A total of 10/14 anterior videos and 7/11 LAT videos had correlations between motion and breathing of .0.6. Margins of 5.5 mm, 6.8 mm and 6.6 mm in the RL, SI and AP directions, respectively, were determined to gate in exhale. The benefit of gating was greater when motion was .5 mm. Conclusion: The simple approach of using pixel density values from fluoroscopy images to distinguish inhale from exhale and enable gating was successfully applied in all patients. This technique may potentially provide an accurate surrogate for tumour position.

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Section: Determining Motionsupporting

confidence: 88%

Fluoroscopy as a surrogate for lung tumour motion

McNair¹,

Kavanagh²,

Powell³

et al. 2012

BJR

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“…Work by Mori et al is the closest anatomical trajectory analysis work we have found to our own [32]. Although it is presented for a clinical audience, it still shows much of the same information we are able to visualize in our work, and its strengths are that it analyzes 4DCT tumor trajectories by showing them in two-dimensional slices and alternately displaying their trajectories in a 3D environment without the anatomy.…”

Section: Anatomical Motionmentioning

confidence: 78%

Interactive Deformable Registration Visualization and Analysis of 4D Computed Tomography

Erem

Sharp

et al. 2007

Lecture Notes in Computer Science

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“…In the meantime, the complexity introduced by tumor motion and radiation-induced tumor volume changes must be recognized [62][63][64][65].…”

Section: Relative Biologic Effectivenessmentioning

confidence: 99%

Do We Have Enough Evidence to Implement Particle Therapy as Standard Treatment in Lung Cancer? A Systematic Literature Review

et al. 2010

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After completing this course, the reader will be able to:1. Evaluate the published results of particle therapy in the treatment of lung cancer and discuss their implications for the treatment of stage I and stage III NSCLC.2. Using the available evidence to date, assess the current role of particle therapy in the treatment of lung cancer.3. Identify relevant outstanding issues and address these issues with an action plan for further research.This article is available for continuing medical education credit at CME.TheOncologist.com. CME CME ABSTRACTBackground. The societal burden of lung cancer is high because of its high incidence and high lethality. From a theoretical point of view, radiotherapy with beams of protons and heavier charged particles, for example, carbon ions (C-ions), should lead to superior results, compared with photon beams. In this review, we searched for clinical evidence to justify implementa-

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Four-dimensional measurement of lung tumor displacement using 256-multi-slice CT-scanner

Cited by 51 publications

References 35 publications

Fluoroscopy as a surrogate for lung tumour motion

Fluoroscopy as a surrogate for lung tumour motion

Interactive Deformable Registration Visualization and Analysis of 4D Computed Tomography

Do We Have Enough Evidence to Implement Particle Therapy as Standard Treatment in Lung Cancer? A Systematic Literature Review

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