Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Karl Ka Lok Fung"'
Autor:
Karl Ka Lok Fung, Charles T. P. Chan
Publikováno v:
Journal of Medical Imaging and Radiation Sciences. 46:65-77
Objective This study aims at investigating the feasibility of replacing an antiscatter grid with an air gap to achieve dose reduction for lumbar spine radiography while retaining image quality at an acceptable diagnostic level. Methods Frontal and la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b1cd46fa0ef37110825a7fe03647015
https://doi.org/10.1016/j.jmir.2014.08.003
https://doi.org/10.1016/j.jmir.2014.08.003
Publikováno v:
Materials and Structures. 46:1133-1141
The types of aggregate used play an important role in determining the effectiveness of X-ray radiation protection of cement mortars. Cement mortars were prepared using fine aggregates obtained from six different sources. The influence of aggregate ty
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d192bec5aaea06c7ca07aef876e07a7
https://doi.org/10.1617/s11527-012-9959-2
https://doi.org/10.1617/s11527-012-9959-2
Autor:
Anson C.M. Chau, Karl Ka Lok Fung
Publikováno v:
Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology. 107:559-565
Objective:The objective of this study was to compare typical patient radiation dose delivered in implant imaging with spiral computed tomography (CT), conventional spiral tomography, and cone-beam CT (CBCT). Study design: The Scanora (Orion Corporati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ddf444c03cf3be622c8d66c253006c68
https://doi.org/10.1016/j.tripleo.2008.11.009
https://doi.org/10.1016/j.tripleo.2008.11.009
Publikováno v:
Applied Radiation and Isotopes. 64:934-939
A high-resolution radiochromic film dosimetry (Hr-RCFD) method has been applied to verify a small-field stereotactic radiosurgery (SRS) plan. This was done by exposing a RCF in a Perspex head phantom undergoing the same treatment plan as the patient.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::561f35d09ebcbe0f2766ee216df62eeb
https://doi.org/10.1016/j.apradiso.2006.03.011
https://doi.org/10.1016/j.apradiso.2006.03.011
Publikováno v:
Medical Physics. 32:1485-1490
Radiochromic film (RCF) dosimetry is usually based on densitometric methods which use an analyzing light source of a fixed or a broad spectrum of wavelengths. These methods have not exploited the sensitivity of the dose response of the RCF otherwise
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fe0b9c6cf4547faf237b45b52d39fd6
https://doi.org/10.1118/1.1914544
https://doi.org/10.1118/1.1914544
Publikováno v:
Ophthalmic and Physiological Optics. 24:436-439
The purpose of this study was to examine the development of the orbit in Hong Kong Chinese subjects. Orbit volume was determined from magnetic resonance images of 81 subjects aged from 1 to 42 years old. Results show that orbit volume ranged from 11.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6588bdfb0aa2a082429ae8f9ff658bb1
https://doi.org/10.1111/j.1475-1313.2004.00217.x
https://doi.org/10.1111/j.1475-1313.2004.00217.x
Autor:
Karl Ka Lok Fung
Publikováno v:
Radiography. 10:145-150
This study investigated the dosimetric properties of the high sensitivity TLD (Thermoluminescent Dosemeter) of LiF:Mg,Cu,P and its applications in diagnostic radiology. A reproducible readout and annealing regime for this high sensitivity TLD was dev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d57738f2b23450e0b5e97b4db0565c56
https://doi.org/10.1016/j.radi.2004.01.021
https://doi.org/10.1016/j.radi.2004.01.021
Publikováno v:
Ophthalmic and Physiological Optics. 24:35-40
The purpose of this study is to determine if there is an association between eye size and the volume of the orbit in adult subjects. Thirty-three subjects with varying degrees of ametropia (+1.00 to -12.75 D) underwent magnetic resonance scan of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d12a1a060890db0c3d1b3d85c4f9af1b
https://doi.org/10.1046/j.1475-1313.2003.00159.x
https://doi.org/10.1046/j.1475-1313.2003.00159.x
Autor:
Charles T. P. Chan, Karl Ka Lok Fung
Publikováno v:
Journal of medical imaging and radiation sciences. 45(3)
Objective This study aimed at investigating the air kerma distribution of the radiation output in two and three dimensions of three general radiographic units by physical measurements. Methods A 6-cm 3 ionization chamber was placed at 5-cm intervals
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bac162e317374fb462eb4aa03d455793
https://pubmed.ncbi.nlm.nih.gov/31051973
https://pubmed.ncbi.nlm.nih.gov/31051973
Purpose This study reports a calibration carried out on phantoms simulating the orbit and eyeball to evaluate the accuracy of volumetric determination using MRI DICOM (Digital Imaging and Communication in Medicine) images. Methods Ten tailor-made sph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6fc2dd188029fb2008be54cda4c59397
https://hdl.handle.net/11541.2/143959
https://hdl.handle.net/11541.2/143959
