PMID- 27106507 OWN - NLM STAT- MEDLINE DCOM- 20180102 LR - 20180102 IS - 2253-8070 (Electronic) IS - 2253-654X (Linking) VI - 35 IP - 6 DP - 2016 Nov-Dec TI - A comparative study of the target volume definition in radiotherapy with <> vs. 4D PET/CT Scan in early stages non-small cell lung cancer. PG - 373-378 LID - S2253-654X(16)00025-1 [pii] LID - 10.1016/j.remn.2016.02.003 [doi] AB - OBJECTIVES: To evaluate the use of 4D PET/CT to quantify tumor respiratory motion compared to the <>-CT (CTs) in the radiotherapy planning process. MATERIAL AND METHODS: A total of 25 patients with inoperable early stage non small cell lung cancer (NSCLC) were included in the study. Each patient was imaged with a CTs (4s/slice) and 4D PET/CT. The adequacy of each technique for respiratory motion capture was evaluated using the volume definition for each of the following: Internal target volume (ITV) 4D and ITVslow in relation with the volume defined by the encompassing volume of 4D PET/CT and CTs (ITVtotal). The maximum distance between the edges of the volume defined by each technique to that of the total volume was measured in orthogonal beam's eye view. RESULTS: The ITV4D showed less differences in relation with the ITVtotal in both the cranio-caudal and the antero-posterior axis compared to the ITVslow. The maximum differences were 0.36mm in 4D PET/CTand 0.57mm in CTs in the antero-posterior axis. 4D PET/CT resulted in the definition of more accurate (ITV4D/ITVtotal 0.78 vs. ITVs/ITVtotal 0.63), and larger ITVs (19.9 cc vs. 16.3 cc) than those obtained with CTs. CONCLUSION: Planning with 4D PET/CT in comparison with CTs, allows incorporating tumor respiratory motion and improving planning radiotherapy of patients in early stages of lung cancer. CI - Copyright (c) 2016 Elsevier Espana, S.L.U. y SEMNIM. All rights reserved. FAU - Molla, M AU - Molla M AD - Departamento de Oncologia Radioterapica, Hospital Universitario Vall d'Hebron, Barcelona, Espana. Electronic address: meritxellmolla@gmail.com. FAU - Anducas, N AU - Anducas N AD - Departamento de Fisica Medica, Hospital Universitario Vall d'Hebron, Barcelona, Espana. FAU - Simo, M AU - Simo M AD - Departamento de Medicina Nuclear, Hospital Universitario Vall d'Hebron, Barcelona, Espana. FAU - Seoane, A AU - Seoane A AD - Departamento de Fisica Medica, Hospital Universitario Vall d'Hebron, Barcelona, Espana. FAU - Ramos, M AU - Ramos M AD - Departamento de Oncologia Radioterapica, Hospital Universitario Vall d'Hebron, Barcelona, Espana. FAU - Cuberas-Borros, G AU - Cuberas-Borros G AD - Departamento de Medicina Nuclear, Hospital Universitario Vall d'Hebron, Barcelona, Espana. FAU - Beltran, M AU - Beltran M AD - Departamento de Fisica Medica, Hospital Universitario Vall d'Hebron, Barcelona, Espana. FAU - Castell, J AU - Castell J AD - Departamento de Medicina Nuclear, Hospital Universitario Vall d'Hebron, Barcelona, Espana. FAU - Giralt, J AU - Giralt J AD - Departamento de Oncologia Radioterapica, Hospital Universitario Vall d'Hebron, Barcelona, Espana. LA - eng LA - spa PT - Comparative Study PT - Journal Article TT - Estudio comparativo en la definicion del volumen de tratamiento en radioterapia con <> vs. 4D PET/TC Scan en estadios iniciales de cancer de pulmon de celula no pequena. DEP - 20160419 PL - Spain TA - Rev Esp Med Nucl Imagen Mol JT - Revista espanola de medicina nuclear e imagen molecular JID - 101585329 SB - IM MH - Aged MH - Aged, 80 and over MH - Carcinoma, Non-Small-Cell Lung/*diagnostic imaging/pathology/*radiotherapy MH - Female MH - *Four-Dimensional Computed Tomography/methods MH - Humans MH - Lung Neoplasms/*diagnostic imaging/pathology/*radiotherapy MH - Male MH - Middle Aged MH - Neoplasm Staging MH - *Positron Emission Tomography Computed Tomography MH - Radiotherapy Planning, Computer-Assisted/methods MH - Respiration MH - Time Factors OTO - NOTNLM OT - 4D-PET/TC OT - Cancer de pulmon OT - Lung cancer OT - Planificacion del tratamiento OT - Radioterapia OT - Radiotherapy OT - Treatment planning EDAT- 2016/11/05 06:00 MHDA- 2018/01/03 06:00 CRDT- 2016/04/24 06:00 PHST- 2015/12/02 00:00 [received] PHST- 2016/01/13 00:00 [revised] PHST- 2016/02/02 00:00 [accepted] PHST- 2016/11/05 06:00 [pubmed] PHST- 2018/01/03 06:00 [medline] PHST- 2016/04/24 06:00 [entrez] AID - S2253-654X(16)00025-1 [pii] AID - 10.1016/j.remn.2016.02.003 [doi] PST - ppublish SO - Rev Esp Med Nucl Imagen Mol. 2016 Nov-Dec;35(6):373-378. doi: 10.1016/j.remn.2016.02.003. Epub 2016 Apr 19.