Ajay Sandhu

ORCID: 0000-0003-4154-308X
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Research Areas
  • Advanced Radiotherapy Techniques
  • Lung Cancer Diagnosis and Treatment
  • Prostate Cancer Diagnosis and Treatment
  • Medical Imaging Techniques and Applications
  • Prostate Cancer Treatment and Research
  • Head and Neck Cancer Studies
  • Radiomics and Machine Learning in Medical Imaging
  • Radiation Dose and Imaging
  • Policing Practices and Perceptions
  • Glioma Diagnosis and Treatment
  • Management of metastatic bone disease
  • Crime Patterns and Interventions
  • Lung Cancer Treatments and Mutations
  • Advances in Oncology and Radiotherapy
  • Radiation Therapy and Dosimetry
  • Privacy, Security, and Data Protection
  • Effects of Radiation Exposure
  • Cancer Diagnosis and Treatment
  • Cybercrime and Law Enforcement Studies
  • Meningioma and schwannoma management
  • Brain Metastases and Treatment
  • Crime, Deviance, and Social Control
  • Wildlife Conservation and Criminology Analyses
  • Head and Neck Surgical Oncology
  • Thyroid Cancer Diagnosis and Treatment

Government Medical College
2024

Government Medical College, Amritsar
2024

University of Health Science
2024

Toronto Metropolitan University
2020-2023

University of Essex
2017-2023

University of California, San Diego
2012-2022

Philadelphia University
2020-2021

Pioneer Hi-Bred
2019

Society of Thoracic Surgeons
2018

University of Alberta
2012-2016

Circulating tumor cell (CTC) counts are an established prognostic marker in metastatic prostate, breast and colorectal cancer, recent data suggest a similar role late stage non-small lung cancer (NSCLC). However, due to sensitivity constraints current enrichment-based CTC detection technologies, there few published about prevalence rates morphologic heterogeneity early-stage NSCLC, or the correlation of CTCs with disease progression their usability for clinical staging. We investigated...

10.1088/1478-3967/9/1/016005 article EN Physical Biology 2012-02-01

Lung tumor motion due to respiration poses a challenge in the application of modern three-dimensional conformal radiotherapy. Direct tracking lung during radiation therapy is very difficult without implanted fiducial markers. Indirect relies on correlation tumor's and surrogate's motion. The present paper presents an analysis between diaphragm order evaluate potential use as surrogate for We have analyzed superior–inferior 32 fluoroscopic image sequences from ten cancer patients. A simple...

10.1088/0031-9155/54/11/017 article EN Physics in Medicine and Biology 2009-05-15

Purpose: Understanding motion characteristics of liver such as, interfractional and intrafractional variability, difference in within different locations the organ, their complex relationship with breathing cycles are particularly important for image‐guided SBRT. The purpose this study was to investigate based on fiducial markers tracked x‐ray projections CBCT scans, taken immediately prior treatments. Methods: Twenty SBRT patients were analyzed. Each patient had three (2 × 5‐mm gold)...

10.1118/1.4754658 article EN Medical Physics 2012-10-01

Predictive policing generally refers to police work that utilises strategies, algorithmic technologies, and big data generate near-future predictions about the people places deemed likely be involved in or experience crime. Claimed benefits of predictive centre on technology's ability enable pre-emptive by automating decisions. The goal is officers will rely computer software smartphone applications instruct them where who just as Uber drivers similar technologies pick up passengers....

10.1080/10439463.2020.1803315 article EN cc-by Policing & Society 2020-08-04

Purpose Four‐dimensional computed tomography (4DCT) has enhanced images of the thorax and upper abdomen during respiration, but intraphase residual motion artifacts will persist in cine‐mode scanning. In this study, source magnitude projection due to target is investigated. Methods A theoretical model geometric uncertainty partial 4DCT was derived based on ideal periodic motion. Predicted were compared measured errors with a rigid lung phantom attached programmable platform. Ideal actual...

10.1118/1.3432615 article EN Medical Physics 2010-05-21

On any shift a police officer might be filmed by some combination of public or private surveillance cameras, including the cameras individual citizens, activists, journalists, businesses, and range police-controlled cameras. This loosely coordinated camera infrastructure is part broader transformation policing from historically “low visibility” to an increasingly ‘high visibility’ occupation. article reports on findings participant-observation study how officers understand respond this...

10.1177/1362480615622531 article EN Theoretical Criminology 2015-12-19

In the surveillance society, police are increasingly monitored by a growing network of cameras. Contemporary studies have begun to pay attention new and highly visible reality that officers occupy, speculate about how this impacts work. Attention is also given officers, as subjects experiencing higher visibility, understand, adapt camera-packed environments, both which key questions in ongoing process revealing police, one society's socio-legal institutions, impacted emerging society. This...

10.1080/10439463.2017.1285917 article EN Policing & Society 2017-02-06

Treatment of presumed early-stage lung cancer with definitive radiation therapy in the absence a pathologically confirmed specimen frequently occurs. However, it is not well described literature, and there are few North American series reporting on this patient population. We report outcomes patients treated stereotactic body radiotherapy (SBRT) for compare them to SBRT non-small cell (NSCLC).This study based retrospective review 55 or cancer: 23 had nondiagnostic absent pathologic specimens...

10.1177/1753465813512545 article EN Therapeutic Advances in Respiratory Disease 2013-12-10

This article analyses adoptions of innovative technology into police surveillance activities. Extending the nascent body empirical research on digital policing, draws qualitative interview data operational uses advanced technologies. Separate illustrative examples are drawn from social media intelligence gathering, forensics and covert online child sexual exploitation investigations. Here, governance mechanisms, often authored in ‘pre-digital’ era, deemed ill-fitting to possibilities brought...

10.1177/1362480620967020 article EN cc-by Theoretical Criminology 2020-10-29

Disparities in prostate cancer-specific mortality (PCSM) between African American and non-Hispanic White (White) patients have been attributed to biological systemic factors. We evaluated drivers of these disparities the Surveillance, Epidemiology, End Results (SEER) national registry an equal-access system, Veterans Health Administration (VHA).We identified diagnosed with cancer 2004 2015 SEER (n = 311 691) VHA 90 749). analyzed association race metastatic disease at presentation using...

10.1093/jnci/djab062 article EN JNCI Journal of the National Cancer Institute 2021-04-20

Background Radiation recall pneumonitis (RRP) is a poorly understood clinical syndrome in which patients develop radiation triggered by systemic agent, often years after the completion of therapy. Immune checkpoint blockade agents have only recently been posited as trigger for RRP. Here, we present three cases immunotherapy-induced Case Presentation Our first patient was diagnosed with primary lung adenocarcinoma, and 4.5 completing therapy developed symptomatic RRP immediately following...

10.3389/fonc.2021.662954 article EN cc-by Frontiers in Oncology 2021-04-30

Purpose: To assess the temporal and spatial accuracy of GateCT™ system (VisionRT, London, UK), a recently released respiratory tracking for 4DCT, under both ideal nonideal conditions. Methods: Three experiments were performed by benchmarking comparing its results with ground-truth input data those generated widely used Varian RPM™ (Real-time Position Management, Varian, Palo Alto, CA). The first experiment 10 sinusoidal breathing patterns (constant amplitude frequency using sin6ωt),...

10.1118/1.3671941 article EN Medical Physics 2011-12-30

How do police respond to the presence of cameras and photographers? Many speculative theories have been proposed offering mixed sometimes contradictory answers this question. Some propose that will deter misconduct, others suggest might improve accountability, by engaging in a risk-averse style policing. Unfortunately, little empirical data is available assess these theories. Drawing on from participant-observation research study conducted Edmonton, Alberta, Canada, paper helps fill gap...

10.24908/ss.v14i1.5697 article EN cc-by-nc-nd Surveillance & Society 2016-05-09

<p>Predictive policing generally refers to police work that utilises strategies, algorithmic technologies, and big data generate near-future predictions about the people places deemed likely be involved in or experience crime. Claimed benefits of predictive centre on technology’s ability enable pre-emptive by automating decisions. The goal is officers will rely computer software smartphone applications instruct them where who just as Uber drivers similar technologies pick up...

10.32920/23656788.v1 preprint EN cc-by 2023-07-10

Purpose: To report our experience in the use of interstitial iridium-192 implantation combined with external radlotherapy anal cancer.Methods and Materials: From 1984 to 1994,79 patients cancer were treated radical intent using radiotherapy (plus chemotherapy) at Beatson Oncology Centre, Glasgow, Scotland.The mean median age presentation 68 70 years, respectively (range 34-85) a male-to-female ratio 0.39.The histologic distribution was as follows: 48 squamous, 16 basaloid, 14 adenocarcinoma,...

10.1016/s0360-3016(97)00814-6 article EN cc-by-nc-nd International Journal of Radiation Oncology*Biology*Physics 1998-02-01
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