The Relationship between the Contouring Time of the Metal Artifacts Area and Metal Artifacts in Head and Neck Radiotherapy
Abstract
:1. Introduction
2. Materials and Methods
2.1. Patients
2.2. Radiotherapy Treatment Planning Computed Tomography Data
2.3. Contouring of the Dental Metal Artifacts Area
2.4. Evaluation
3. Results
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Characteristics | N = 9 |
---|---|
Age, range (median) | 55–76 years (66) |
Gender | |
Male Female | 9 0 |
Primary tumor site | |
Nasopharynx Oropharynx Larynx Maxillary sinus | 2 4 2 1 |
Tumor classification | |
T1 T2 T3 T4a T4b | 3 2 2 1 1 |
Node classification | |
N0 N1 N2b N2c | 1 4 3 1 |
Cancer stage | |
I II III IVA IVB | 1 2 2 3 1 |
Number of CT images | |
Oral cavity, range (median) MAs, range (median) | 21–26 images (24) 4–18 images (11) |
Volume of extracted MAs, range (median) | 16.8–245.4 cc (105.3) |
Contouring time of MAs area (median) | 6.4–72.7 min (19.3) |
Severities of MAs | ||||
---|---|---|---|---|
Mild (<25%) Median (Range) | Moderate (25–75%) Median (Range) | Severe (>75%) Median (Range) | p | |
Volume of extracted MAs | 49.2 cc (16.8–72.4) | 108.8 cc (53.9–142.7) | 209.8 cc (98.3–245.4) | <0.001 |
Contouring time of MAs area | 16.1 min. (6.4–32.7) | 25.8 min. (11.4–46.2) | 40.3 min. (14.7–72.7) | <0.014 |
Contouring Time of MAs Area | p | |
---|---|---|
Volume of extracted MAs | r = 0.535 | 0.004 |
Number of CT slices containing MAs | r = 0.596 | <0.001 |
Volume of Extracted MAs | Contouring Times of MAs Area | |||||
---|---|---|---|---|---|---|
Observer (Clinical Experience) | Volume Median (Range) | ICC | 95% CI | Contouring Time Median (Range) | ICC | 95% CI |
A (1 year) | 96.9 cc (19.2–245.4) | 0.934 | 0.78–0.98 | 40.4 min. (16.1–53.2) | 0.312 | −0.01–0.72 |
B (4 years) | 112.9 cc (22.9–243.6) | 14.1 min. (6.4–25.4) | ||||
C (12 years) | 127.6 cc (31.2–283.5) | 18.5 min. (9.1–90.9) |
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Katsura, K.; Tanabe, S.; Nakano, H.; Sakai, M.; Ohta, A.; Kaidu, M.; Soga, M.; Kobayashi, T.; Takamura, M.; Hayashi, T. The Relationship between the Contouring Time of the Metal Artifacts Area and Metal Artifacts in Head and Neck Radiotherapy. Tomography 2023, 9, 98-104. https://doi.org/10.3390/tomography9010009
Katsura K, Tanabe S, Nakano H, Sakai M, Ohta A, Kaidu M, Soga M, Kobayashi T, Takamura M, Hayashi T. The Relationship between the Contouring Time of the Metal Artifacts Area and Metal Artifacts in Head and Neck Radiotherapy. Tomography. 2023; 9(1):98-104. https://doi.org/10.3390/tomography9010009
Chicago/Turabian StyleKatsura, Kouji, Satoshi Tanabe, Hisashi Nakano, Madoka Sakai, Atsushi Ohta, Motoki Kaidu, Marie Soga, Taichi Kobayashi, Masaki Takamura, and Takafumi Hayashi. 2023. "The Relationship between the Contouring Time of the Metal Artifacts Area and Metal Artifacts in Head and Neck Radiotherapy" Tomography 9, no. 1: 98-104. https://doi.org/10.3390/tomography9010009