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Radiotherapy of nasopharyngeal cancer using Rapidarc: dosimetric study of military teaching hospital Mohamed V, Morocco.

Abstract The aim of the present study is to assess efficacy and efficiency of Volumetric-modulated arc therapy (VMAT) technique in treatment of nasopharyngeal cancer in our institution and to report toxicity related to this technique.
PMID
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Authors

Mayor MeshTerms
Keywords

Intensity-modulated radiotherapy

Nasopharyngeal cancer

Volumetric-modulated arc therapy

Journal Title bmc research notes
Publication Year Start




PMID- 28241884
OWN - NLM
STAT- MEDLINE
DA  - 20170228
DCOM- 20170317
LR  - 20170317
IS  - 1756-0500 (Electronic)
IS  - 1756-0500 (Linking)
VI  - 10
IP  - 1
DP  - 2017 Feb 28
TI  - Radiotherapy of nasopharyngeal cancer using Rapidarc: dosimetric study of
      military teaching hospital Mohamed V, Morocco.
PG  - 112
LID - 10.1186/s13104-017-2430-2 [doi]
AB  - BACKGROUND: The aim of the present study is to assess efficacy and efficiency of 
      Volumetric-modulated arc therapy (VMAT) technique in treatment of nasopharyngeal 
      cancer in our institution and to report toxicity related to this technique.
      METHODS: Between June 2013 and January 2015, thirty-two patients with non
      metastatic nasopharyngeal cancer were curatively treated using VMAT Rapidarc.
      Dose prescription was performed using two different schedules, it consisted of
      either simultaneous integrated boost or simultaneous modulated accelerated
      radiation therapy delivering 70 Gy in 35 fractions and 69.96 in 33 fractions
      respectively. The choice was leaved at the discretion of the treating physician. 
      The optimization process was performed by Eclipse software version 10.0 (Varian
      Medical Systems), using PRO algorithm (Progressive resolutive optimisation)
      version 3. Data was collected from dose-volume histograms for both planning
      target volumes (PTV) and organs at risk (OAR). We calculated the homogeneity
      index and the conformity index as well as the number of monitor units MU and the 
      treatment delivery time. We also reported acute and late toxicity related to
      radiation therapy. RESULTS: For the PTV high risk (HR), intermediate risk (PTV
      IR) and low risk (LR) the D95% was 97.21 +/- 1.5, 97.5 +/- 3.3 and 97.10 +/- 6.86
      respectively. Whereas, The D5% was 104.6 +/- 2.16, 103.8 +/- 2.1 and 100.89 +/-
      7.26. The CI for PTV HR was 0.98 +/- 0.02 and the HI was 0.08 +/- 0.02. The mean 
      treatment delivery time was 2.3 +/- 0.2, and the mean MU number was 527.6 +/-
      131.4. Grade 4 toxicity was not reported in any case. Grade 3 xerostomia was
      observed in only 3(9.4%) patients and no patients developed grade 3 hearing loss.
      CONCLUSION: Our results confirmed the abilities of VMAT to provide excellent
      coverage of target volumes while sparing OAR especially the nervous structures
      and salivary glands.
FAU - Lalya, Issam
AU  - Lalya I
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
AD  - Cadi Ayyad University, Marrakech, Morocco.
FAU - Marnouche, El Amin
AU  - Marnouche EA
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
      elaminmarnouche@gmail.com.
FAU - Abdelhak, Maghous
AU  - Abdelhak M
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
FAU - Zaghba, Noha
AU  - Zaghba N
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
FAU - Andaloussi, Khalid
AU  - Andaloussi K
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
FAU - Elmarjany, Mohamed
AU  - Elmarjany M
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
FAU - Baddouh, Laila
AU  - Baddouh L
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
FAU - Dahmani, Keltoum
AU  - Dahmani K
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
FAU - Hadadi, Khalid
AU  - Hadadi K
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
FAU - Sifat, Hassan
AU  - Sifat H
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
FAU - Mansouri, Hamid
AU  - Mansouri H
AD  - Department of Radiotherapy, Mohamed V Military Hospital, Rabat, Morocco.
LA  - eng
PT  - Journal Article
DEP - 20170228
PL  - England
TA  - BMC Res Notes
JT  - BMC research notes
JID - 101462768
SB  - IM
MH  - Adult
MH  - Dermatitis/etiology
MH  - Female
MH  - Hearing Loss/etiology
MH  - Hospitals, Military
MH  - Hospitals, Teaching
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Morocco
MH  - Mucositis/etiology
MH  - Nasopharyngeal Neoplasms/*radiotherapy
MH  - Radiometry/methods
MH  - Radiotherapy Dosage
MH  - Radiotherapy Planning, Computer-Assisted/*methods
MH  - Radiotherapy, Intensity-Modulated/adverse effects/*methods
MH  - Retrospective Studies
MH  - Treatment Outcome
MH  - Xerostomia/etiology
PMC - PMC5330004
OTO - NOTNLM
OT  - Intensity-modulated radiotherapy
OT  - Nasopharyngeal cancer
OT  - Volumetric-modulated arc therapy
EDAT- 2017/03/01 06:00
MHDA- 2017/03/18 06:00
CRDT- 2017/03/01 06:00
PHST- 2015/12/30 [received]
PHST- 2017/02/15 [accepted]
AID - 10.1186/s13104-017-2430-2 [doi]
AID - 10.1186/s13104-017-2430-2 [pii]
PST - epublish
SO  - BMC Res Notes. 2017 Feb 28;10(1):112. doi: 10.1186/s13104-017-2430-2.

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