Asim Afaq
University College Hospital
Intraclass correlationCorrelationInternal medicineRadiologyPET-CTPathologyMagnetic resonance imagingUltrasoundOncologyStage (cooking)Medical physicsPositron emission tomographyProstateBiochemical recurrenceBrachytherapyMetastasisProstatectomyProstate cancerSalvage therapyProstate-specific antigenProstate BedNuclear medicineRadiation therapyColorectal cancerEffective diffusion coefficientMedicine
51Publications
14H-index
880Citations
Publications 49
Newest
#1Olivio F. Donati (UZH: University of Zurich)H-Index: 27
#2Asim Afaq (NIHR: National Institute for Health Research)H-Index: 14
Last. Oguz AkinH-Index: 48
view all 8 authors...
Purpose To investigate whether tumor volume derived from apparent diffusion coefficient (ADC) maps (VolumeADC) and tumor mean ADC value (ADCmean) are independent predictors of prostate tumor Gleason score (GS). Materials and Methods Tumor volume and GS were recorded from whole-mount histopathology for 131 men (median age, 60) who underwent endorectal diffusion-weighted magnetic resonance imaging for local staging of prostate cancer before prostatectomy. VolumeADC and ADCmean were derived from AD...
51 CitationsSource
#1Mark WillsH-Index: 2
#2Chris J HarveyH-Index: 25
Last. David O. CosgroveH-Index: 67
view all 5 authors...
Ultrasound is the modality of choice for the initial assessment of the gall bladder and the biliary tree. This article is the first of two, and details normal ultrasound appearances of the gall bladder, as well as appearances of cholecystitis, sludge, adenomyomatosis, polyps, carcinoma and parasites.
2 CitationsSource
#1Mark WillsH-Index: 2
#2Chris J HarveyH-Index: 25
Last. David O. CosgroveH-Index: 67
view all 5 authors...
Ultrasound is the modality of choice for the initial assessment of the gall bladder and the biliary tree. This article details normal ultrasound appearances of the biliary tree, as well as appearances of biliary obstruction, biliary cirrhosis, biliary gall-stones, developmental disorders, cholangiopathies and cholangiocarcinoma.
Source
#1Olivio F. Donati (MSK: Memorial Sloan Kettering Cancer Center)H-Index: 27
#2Yousef MazaheriH-Index: 24
Last. Oguz AkinH-Index: 48
view all 8 authors...
When apparent diffusion coefficient (ADC) parameters are determined from whole-lesion histogram analysis, the 10th percentile ADC correlates better with the Gleason score and enables more accurate differentiation of prostate cancer lesions with a Gleason score of 6 from those with a Gleason score of at least 7 than do other ADC parameters commonly used in the literature.
183 CitationsSource
Microbubbles as an ultrasound contrast agent allow characterization of focal liver lesions. This article summarizes the ultrasound appearances and enhancement characteristics of malignant liver lesions, and also discusses its potential use for ultrasound-guided intervention and ablation of liver lesions.
4 CitationsSource
#1Afshin NasoodiH-Index: 1
#2Rizwan Syed (UCLH: University College Hospital)H-Index: 12
Last. Jamshed Bomanji (UCLH: University College Hospital)H-Index: 52
view all 4 authors...
Magnetic resonance imaging (MRI) has long been considered the gold standard for evaluation of hepatic lesions. There has, however, been much recent interest in functional analysis of malignant lesions, and conventional imaging tests are no longer able to answer all the clinical questions. In the current era, anatomical characterisation, e.g. regarding size and density, is no longer deemed adequate. Combined imaging with PET/CT provides clarity and insight but at times can be challenging, especia...
2 CitationsSource
Microbubbles as an ultrasound contrast agent allow characterization of focal liver lesions. This article summarizes the ultrasound appearances and enhancement characteristics of benign liver lesions, focal fatty sparing and focal fatty change, and blunt liver trauma.
4 CitationsSource
#1Thida Win (Lister Hospital)H-Index: 27
#2Benjamin A. Thomas (UCL: University College London)H-Index: 10
Last. Ashley M. Groves (UCL: University College London)H-Index: 48
view all 13 authors...
Purpose Patients with idiopathic pulmonary fibrosis (IPF) show increased PET signal at sites of morphological abnormality on high-resolution computed tomography (HRCT). The purpose of this investigation was to investigate the PET signal at sites of normal-appearing lung on HRCT in IPF.
41 CitationsSource
#1Khalsa Al-Nabhani (UCLH: University College Hospital)H-Index: 2
#2Rizwan Syed (UCLH: University College Hospital)H-Index: 12
Last. Jamshed Bomanji (UCLH: University College Hospital)H-Index: 52
view all 10 authors...
The aim of this study was to prospectively compare whole-body PET/MR imaging and PET/CT, qualitatively and quantitatively, in oncologic patients and assess the confidence and degree of inter- and intraobserver agreement in anatomic lesion localization. Methods: Fifty patients referred for staging with known cancers underwent PET/CT with low-dose CT for attenuation correction immediately followed by PET/MR imaging with 2-point Dixon attenuation correction. PET/CT scans were obtained according to ...
71 CitationsSource
#1Asim Afaq (UCLH: University College Hospital)H-Index: 14
#2Rizwan Syed (UCLH: University College Hospital)H-Index: 12
Last. Jamshed Bomanji (UCLH: University College Hospital)H-Index: 52
view all 3 authors...
Background: The introduction of the new simultaneous PET/MRI scanner opens new opportunities in functional imaging. Sources of data: This article is based on the literature review and our personal experience of the first simultaneous PET/MRI scanner in the UK. Areas of agreement: PET/CT is well established and a key component of management guidance in a range of diseases. MRI has superior soft tissue resolution, which is useful in the evaluation of many diseases. Areas of controversy: There are ...
9 CitationsSource