Improving the consistency in cervical esophageal target volume definition by special training

Tai, Patricia; Dyk, Jake Van; Battista, Jerry; Yu, Edward; Stitt, Larry; Tonita, Jon; Agboola, O.; Brierley, James D.; Dar, R.; Leighton, Christopher; Malone, Shawn; Strang, Barbara; Truong, Pauline T.; Videtic, Gregory M.M.; Wong, C. Shun; Wong, Rebecca; Youssef, Youssef

doi:10.1016/s0360-3016(02)02752-9

Cited by 38 publications

(28 citation statements)

References 8 publications

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“…There remained significant variation in CTV segmentation anteriorly and in the infratemporal region between different observers after using the COSTAR protocol, possibly due to lack of bony reference points in the anterior part of the neck and in the infratemporal region. These results are consistent with previous publications for other tumour sites, including prostate cancer [30], oesophageal cancer [12] and HNC [22]. Mitchell et al [30] showed significant interobserver variation in CTV segmentation for post-prostatectomy radiotherapy, which was reduced by the use a contouring protocol.…”

Section: Interobserver Variation In Clinical Target Volumesupporting

confidence: 91%

“…They reported reduced interobserver variation after use of the contouring protocol. The observed increase in mean CTV volume with use of a segmentation protocol is also consistent with previously published studies [12,30].…”

Section: Interobserver Variation In Clinical Target Volumesupporting

confidence: 91%

“…Mitchell et al [30] showed significant interobserver variation in CTV segmentation for post-prostatectomy radiotherapy, which was reduced by the use a contouring protocol. Tai et al [12] reported an improved consistency in cervical oesophagus target segmentation after one-to-one training. Three cases were used to represent different clinical situations and the use of a segmentation protocol reduced the variation of the longitudinal positions of GTV, CTV and PTV for all cases.…”

Section: Interobserver Variation In Clinical Target Volumementioning

confidence: 99%

“…It has been suggested in a number of tumour sites that the largest systematic error in radiotherapy planning today is related to the radiation oncologist's ability to localise and delineate the target volume [4][5][6][7][8][9][10][11][12][13][14][15]. When using IMRT and inverse planning, accurate and consistent segmentation of target and normal tissues impacts not only on the spatial localisation of the high-dose volume, but also on accuracy of dose calculation to organs at risk (OARs).…”

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confidence: 99%

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Interobserver variation in clinical target volume and organs at risk segmentation in post-parotidectomy radiotherapy: can segmentation protocols help?

Mukesh¹,

Benson²,

Jena³

et al. 2012

The British Journal of Radiology

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Objective: A study of interobserver variation in the segmentation of the post-operative clinical target volume (CTV) and organs at risk (OARs) for parotid tumours was undertaken. The segmentation exercise was performed as a baseline, and repeated after 3 months using a segmentation protocol to assess whether CTV conformity improved. Methods: Four head and neck oncologists independently segmented CTVs and OARs (contralateral parotid, spinal cord and brain stem) on CT data sets of five patients post parotidectomy. For each CTV or OAR delineation, total volume was calculated. The conformity level (CL) between different clinicians' outlines was measured using a validated outline analysis tool. The data for CTVs were reaanalysed after using the cochlear sparing therapy and conventional radiation segmentation protocol. Results: Significant differences in CTV morphology were observed at baseline, yielding a mean CL of 30% (range 25-39%). The CL improved after using the segmentation protocol with a mean CL of 54% (range 50-65%). For OARs, the mean CL was 60% (range 53-68%) for the contralateral parotid gland, 23% (range 13-27%) for the brain stem and 25% (range 22-31%) for the spinal cord. Conclusions: There was low conformity for CTVs and OARs between different clinicians. The CL for CTVs improved with use of a segmentation protocol, but the CLs remained lower than expected. This study supports the need for clear guidelines for segmentation of target and OARs to compare and interpret the results of head and neck cancer radiation studies.

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Section: Interobserver Variation In Clinical Target Volumesupporting

confidence: 91%

Section: Interobserver Variation In Clinical Target Volumesupporting

confidence: 91%

Section: Interobserver Variation In Clinical Target Volumementioning

confidence: 99%

mentioning

confidence: 99%

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Interobserver variation in clinical target volume and organs at risk segmentation in post-parotidectomy radiotherapy: can segmentation protocols help?

Mukesh¹,

Benson²,

Jena³

et al. 2012

The British Journal of Radiology

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“…In one study reported by Tai et al,12 Canadian radiation oncologists drew cervical esophagus target volumes based on the RTOG 94-05 protocol design both before and after a one-on-one training session (Tai et al, 2002). Pretraining and posttraining survey revealed less variability in the longitudinal positions of the target volumes after training, which illustrates the importance of specialized training.…”

Section: Radiation Therapy Techniquesmentioning

confidence: 99%

Nonsurgical Management of Esophageal Cancer

Safa¹,

Reda²

2012

Esophageal Cancer - Cell and Molecular Biology, Biomarkers, Nutrition and Treatment

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Increasing consistency and accuracy in radiation therapy via educational interventions is not just limited to radiation oncologists

Bell

2016

J of Medical Radiation Sci

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Improving the consistency in cervical esophageal target volume definition by special training

Cited by 38 publications

References 8 publications

Interobserver variation in clinical target volume and organs at risk segmentation in post-parotidectomy radiotherapy: can segmentation protocols help?

Interobserver variation in clinical target volume and organs at risk segmentation in post-parotidectomy radiotherapy: can segmentation protocols help?

Nonsurgical Management of Esophageal Cancer

Increasing consistency and accuracy in radiation therapy via educational interventions is not just limited to radiation oncologists

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