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Inter-observer variation in gross tumour volume delineation of oesophageal cancer on MR, CT and PET/CT Cover

Inter-observer variation in gross tumour volume delineation of oesophageal cancer on MR, CT and PET/CT

Radiology and Oncology
Volume 58 (2024): Issue 4 (December 2024)
By: Ajra Secerov-Ermenc,  Primoz Peterlin,  Franc Anderluh,  Jasna But-Hadzic,  Ana Jeromen-Peressutti,  Vaneja Velenik and  Barbara Segedin  
Open Access
|Oct 2024
Figures & tables

Figures & Tables

FIGURE 1.

The coordinate system for spatial assessment of inter-delineation distances is projected on a single slice of imaging modality containing an example of GTV and divided in 12 angular segments (6 on the left and 6 on the right). Green line represents the reference contour, red line is the test contour.

FIGURE 2.

Mean planar conformity index (PCI) for the GTV as a function of slice number for all imaging modalities for case 22.Blue = computed tomography (CT); Green = fusion of PET/CT and MR; Red = magnetic resonance imaging (MR); Violet = positron emission tomography and CT (PET/CT); Yellow = fusion of CT and MR (CT MR); 1= most caudal slice; 33= most cranial slice.

FIGURE 3.

Delineation of the gross tumour volume (GTV) of all five observers of case 22, sagittal view. The variation in cranial border is highest on computed tomography (CT) and lowest on positron emission tomography (PET/CT) magnetic resonance (MR).(A) CT; (B) PET/CT; (C) fusion of CT and MR; (D) fusion of PET/CT and MR.

FIGURE 4.

Mean inter-delineation distance (IDD) curves of the gross tumour volume (GTV) delineated on different imaging modalities as a function of the angle. The IDD is largest in tumours of the lower third and similar in upper and thirds. (A) Upper third of the oesophagus; (B) Middle third of the oesophagus; (C) Lower third of the oesophagus.Blue = computed tomography; Green = fusion of PET CT and MR. Red = magnetic resonance imaging; Violet = positron emission tomography and CT; Yellow = fusion of CT and MR

Mean volume of gross tumor volume (GTV), CIgen, VCI, PCI, IDD and standard deviation

CT (SD)MR (SD)CT MR (SD)PET/CT (SD)PET/CT MR (SD)
Volume (cm3)37.14 (35.66)33.03 (30.40)35.04 (32.58)44.12 (39.10)40.94 (35.16)
CIgen0.56 (0.18)0.61 (0.14)0.61 (0.14)064 (0.13)0.67 (0.12)
VCI0.67 (0.18)0.71 (0.15)0.71 (0.14)0.74 (0.14)0.77 (0.12)
PCI0.64 (0.17)0.67 (0.16)0.67 (0.15)0.71 (0.14)0.73 (0.13)
IDD (mm)1.39 (1.47)1.44 (1.44)1.70 (1.50)1.68 (1.50)1.60 (1.66)

Characteristics of the patients with oesophageal cancer enrolled in the study

CaseLocation – thirdHistologyTreatmentStageGenderAge
1ProximalSCCdefinitiveT3N0M0M62
2ProximalSCCdefinitiveT3N0M0M66
3DistalACpreoperativeT3N1M0M64
4MiddleSCCdefinitiveT3N1M0M68
5ProximalSCCdefinitiveT3N2M0F60
6ProximalSCCdefinitiveT3N1M0M57
7DistalACpreoperativeT3N1M0M66
8ProximalSCCdefinitiveT3N1M0M64
9DistalACdefinitiveT2N0M0M81
10DistalACpreoperativeT3N2M0M35
11ProximalSCCdefinitiveT3N0M0M58
12DistalSCCpreoperativeT3N1M0M61
13ProximalSCCdefinitiveT3N0M0M63
14MiddleSCCpreoperativeT3N0M0M54
15DistalACpreoperativeT3N0M0M64
16MiddleSCCdefinitiveT3N1M0F83
17DistalACpreoperativeT3N1M0M58
18ProximalSCCdefinitiveT3N0M0M42
19DistalACpreoperativeT3N0M0M75
20ProximalSCCdefinitiveT3N0M0M70
21ProximalSCCdefinitiveT3N2M0F46
22MiddleSCCpreoperativeT3N0M0M53
23MiddleSCCpreoperativeT2N2M0M67
DOI: https://doi.org/10.2478/raon-2024-0043 | Journal eISSN: 1581-3207 | Journal ISSN: 1318-2099
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Language: English
Page range: 580 - 587
Submitted on: May 11, 2024
Accepted on: Jul 25, 2024
Published on: Oct 4, 2024
Published by: Association of Radiology and Oncology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
oesophageal cancer,
gross tumour volume,
positron emission tomography,
magnetic resonance
Related subjects:
Medicine,
Clinical medicine,
Internal medicine,
Haematology, oncology,
Radiology

© 2024 Ajra Secerov-Ermenc, Primoz Peterlin, Franc Anderluh, Jasna But-Hadzic, Ana Jeromen-Peressutti, Vaneja Velenik, Barbara Segedin, published by Association of Radiology and Oncology
This work is licensed under the Creative Commons Attribution 4.0 License.

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