V N Hansen
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Explore the profile of V N Hansen including associated specialties, affiliations and a list of published articles.
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26
Citations
244
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Recent Articles
11.
Bedford J, Convery H, Hansen V, Saran F
Br J Radiol
. 2012 Jan;
85(1016):1128-33.
PMID: 22215885
Objectives: The processes involved in the treatment of paraspinal tumours by volumetric modulated arc therapy (VMAT) are described here by means of an illustrative case. Methods: Az single anticlockwise arc...
12.
Roberts D, Hansen V, Thompson M, Poludniowski G, Niven A, Seco J, et al.
Phys Med Biol
. 2011 Jul;
56(14):4453-64.
PMID: 21719950
Computed tomography images have been acquired using an experimental (low atomic number (Z) insert) megavoltage cone-beam imaging system. These images have been compared with standard megavoltage and kilovoltage imaging systems....
13.
Poludniowski G, Evans P, Hansen V, Webb S
Phys Med Biol
. 2009 Jun;
54(12):3847-64.
PMID: 19491449
A new method is proposed for scatter-correction of cone-beam CT images. A coarse reconstruction is used in initial iteration steps. Modelling of the x-ray tube spectra and detector response are...
14.
Roberts D, Hansen V, Niven A, Thompson M, Seco J, Evans P
Phys Med Biol
. 2008 Oct;
53(22):6305-19.
PMID: 18936518
Experimental and Monte Carlo simulations were conducted for an Elekta Ltd Precise Treatment System linac fitted with a low Z insert of sufficient thickness to remove all primary electrons. A...
15.
Trapp J, Partridge M, Hansen V, Childs P, Bedford J, Warrington A, et al.
Phys Med Biol
. 2004 May;
49(9):1625-35.
PMID: 15152920
In recent years there has been a large amount of research into the potential use of radiation sensitive gels for three-dimensional verification of clinical radiotherapy doses. In this paper we...
16.
McNair H, Parker C, Hansen V, Askew L, Mukherjee R, Nutting C, et al.
Clin Oncol (R Coll Radiol)
. 2004 Apr;
16(2):138-47.
PMID: 15074738
Aims: As the trend towards more conformal treatment continues, the accuracy of treatment delivery becomes more important. Conventionally, treatment set-up for prostate cancer patients is verified in relation to the...
17.
Evans P, Donovan E, Partridge M, Childs P, Convery D, Eagle S, et al.
Radiother Oncol
. 2000 Oct;
57(1):79-89.
PMID: 11033192
Background And Purpose: To develop a method of using a multileaf collimator (MLC) to deliver intensity modulated radiotherapy (IMRT) for tangential breast fields, using an MLC to deliver a set...
18.
Spies L, Evans P, Partridge M, Hansen V, Bortfeld T
Med Phys
. 2000 Apr;
27(3):462-71.
PMID: 10757598
In this study a direct measurement of scatter in portal imaging for various air gaps and scatterer thicknesses at a beam energy of 6 MV is presented. The experimental data...
19.
Evans P, Donovan E, Fenton N, Hansen V, Moore I, Partridge M, et al.
Radiother Oncol
. 1999 Mar;
49(3):255-65.
PMID: 10075258
Background And Purpose: A method of using electronic portal imaging to design compensators for tangential breast irradiation has been developed. We describe how this has been implemented. Materials And Methods:...
20.
Bedford J, Hansen V, Webb S
Br J Radiol
. 1998 Nov;
71(848):876-81.
PMID: 9828802
A formula for the calculation of tissue-maximum ratio (TMR) from percentage depth dose (PDD) and peak scatter factor (PSF) is derived from first principles using a simple geometric model for...