Results 21 to 30 of about 138,112 (286)

Development of 3D-Printed Heterogeneous Tumour Phantom for Quantitative Analysis in PET/CT Imaging [PDF]

MATEC Web of Conferences, 2021
Tumours are heterogenous growths that consists of different types of cells with varying genetic expressions. The complex structure of the tumour makes cancer treatment difficult due to the heterogeneity of each of the cancer cells that react differently ...
Tang Ming Zhao, Choo Hui Leng, Yeong Chai Hong, Wong Yin How   +3 more
doaj   +1 more source

Feasibility of MV CBCT-based treatment planning for urgent radiation therapy: dosimetric accuracy of MV CBCT-based dose calculations. [PDF]

, 2015
Unlike scheduled radiotherapy treatments, treatment planning time and resources are limited for emergency treatments. Consequently, plans are often simple 2D image-based treatments that lag behind technical capabilities available for nonurgent ...
Fogh, Shannon E, Held, Mareike, Morin, Olivier, Pouliot, Jean, Sneed, Penny K   +4 more
core   +1 more source

The validity and reliability of the exposure index as a metric for estimating the radiation dose to the patient [PDF]

, 2020
Introduction With the introduction of digital radiography, the feedback between image quality and over-exposure has been partly lost which in some cases has led to a steady increase in dose.
A. England, Alzyoud, Butler, D. Browne, G. de Vries, H.G. Erenstein, J. Menzinga, J.A. Pires Jorge, M. Sauty, Ma, Mothiram, R.N. Higgins, R.S. Dwyer, Radiography, S. Curtin, S.F. Hommel, Seibert   +16 more
core   +4 more sources

Modified Contrast-Detail Phantom for Determination of the CT Scanners Abilities for Low-Contrast Detection

Applied Sciences, 2021
Computerised tomography (CT) continues to be a corner stone medical and radiologic imaging modalities in radiology and radiotherapy departments. Its importance lies in its efficiency in low contrast detectability (LCD).
Moshi Geso, Salem Saeed Alghamdi, Abdulrahman Tajaldeen, Rowa Aljondi, Hind Alghamdi, Ali Zailae, Essam H. Mattar, Nissren Tamam, Abdullah Aljehani, Hiba Omer, Abdelmoneim Sulieman   +10 more
doaj   +1 more source

Assessment of CT Imaging Protocols Impacts on Calculation of Point Dose in Water Phantom using Radiotherapy Treatment Planning System

Frontiers in Biomedical Technologies, 2020
Purpose: Point dose calculation in the Treatment Planning System (TPS) is performed using Computed Tomography (CT) images because CT images data have the tissue electron density information.
Gholamreza Fallah Mohammadi, Ehsan Mihandoost   +1 more
doaj   +1 more source

Organosilicon phantom for photoacoustic imaging

Journal of Biomedical Optics, 2015
Photoacoustic imaging is an emerging technique. Although commercially available photoacoustic imaging systems currently exist, the technology is still in its infancy. Therefore, the design of stable phantoms is essential to achieve semiquantitative evaluation of the performance of a photoacoustic system and can help optimize the properties of contrast ...
Roberto Pini, Sandro Meucci, Sandro Meucci, Claudia Kusmic, Cecilia Masciullo, Paolo Armanetti, Nicole Di Lascio, Lucia Cavigli, Francesco Faita, Marco Cecchini, Luca Menichetti, Fulvio Ratto, Cinzia Avigo   +12 more
openaire   +5 more sources

Phantom reference image

, 2020
A proton density weighted phantom ...
, Bruno, , Burak, , Pierre, Juergen
openaire   +1 more source

Design of a realistic PET-CT-MRI phantom [PDF]

, 2011
The validation of the PET image quality of new PET-MRI systems should be done against the image quality of currently available PET-CT systems. This includes the validation of new attenuation correction methods.
Espana Palomares, Samuel, Fierens, Yves, Keereman, Vincent, Mollet, Pieter, Vandenberghe, Stefaan   +4 more
core   +1 more source

Iterative CT reconstruction using shearlet-based regularization [PDF]

, 2012
In computerized tomography, it is important to reduce the image noise without increasing the acquisition dose. Extensive research has been done into total variation minimization for image denoising and sparse-view reconstruction. However, TV minimization
Goossens, Bart, Pizurica, Aleksandra, Staelens, Steven, Van Holen, Roel, Vandeghinste, Bert, Vandenberghe, Stefaan, Vanhove, Christian   +6 more
core   +1 more source

A Neck-Thyroid Phantom with Small Sizes of Thyroid Remnants for Postsurgical I-123 and I-131 SPECT/CT Imaging

Life, 2023
Post-surgical I-123 and I-131 SPECT/CT imaging can provide information on the presence and sizes of thyroid remnants and/or metastasis for an accurate re-staging of disease to apply an individualized radioiodine therapy.
Konstantinos Michael, Anastasia Hadjiconstanti, Antonis Lontos, George Demosthenous, Savvas Frangos, Yiannis Parpottas   +5 more
doaj   +1 more source