Daniel Richard Leff

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Functional near infrared spectroscopy (fNIRS) is an emerging tool for non-invasively monitoring the haemodynamic response to brain activation. The technique has been widely adopted to investigate cortical responses during motor tasks in health and disease. This systematic review provides a critical analysis of the research findings in the hope of summating(More)
Screening X-ray mammography is limited by false positives and negatives leading to unnecessary physical and psychological morbidity. Diffuse Optical Imaging using harmless near infra red light, provides lesion detection based on functional abnormalities and represents a novel diagnostic arm that could complement traditional mammography. Reviews of optical(More)
Functional near infrared spectroscopy (fNIRS) is a rapidly developing neuroimaging modality for exploring cortical brain behaviour. Despite recent advances, the quality of fNIRS experimentation may be compromised in several ways: firstly, by altering the optical properties of the tissues encountered in the path of light; secondly, through adulteration of(More)
To investigate neurocognitive mechanisms associated with task-related expertise development, this paper investigates serial changes in prefrontal activation patterns using functional near infrared spectroscopy (fNIRS). We evaluate cortical function in 62 healthy subjects with varying experience during serial evaluations of a knot-tying task. All tasks were(More)
Patients with sickle cell disease (SCD) are at increased risk for cholelithiasis. Laparoscopic cholecystectomy is the most frequent general surgical operation performed for this group of patients. Acute chest syndrome (ACS) is the most common cause of postoperative death among SCD patients. This study aimed to evaluate the impact of a novel perioperative(More)
Diagnosing spigelian hernias through physical examination can be particularly challenging. Increasingly, laparoscopy is being used to both confirm the diagnosis and carry out therapeutic repair. Here, we describe 2 cases of successful laparoscopic repair of spigelian hernias using an Endocatch assisted sutured technique. A review of the literature(More)
INTRODUCTION There are around 40,000 healthcare applications (apps) available for smartphones. Apps have been reviewed in many specialties. Breast cancer is the most common malignancy in females with almost 1.38 million new cases a year worldwide. Despite the high prevalence of breast disease, apps in this field have not been reviewed to date. We have(More)
Endoscopic surgery has been extensively used for many surgical conditions and has gained acceptance as an alternative and less invasive approach to open surgery. However, minimal access endoscopic techniques have yet to be translated into mainstream clinical practice in breast surgery. More recently, technical innovations have made it feasible to conduct(More)
INTRODUCTION To compare the variations in consenting practice amongst trainees and consultant surgeons for laparoscopic cholecystectomy with specific reference to the documentation of significant risks of surgery. PATIENTS AND METHODS A proforma was devised which included significant and/or commonly recognised complications of laparoscopic(More)
BACKGROUND The evolution toward minimally invasive surgery and subsequently to natural orifice translumenal endoscopic surgery (NOTES) poses challenges to the surgeon in terms of increased task complexity requiring greater visuospatial and navigational ability. Neuroergonomics is the study of the brain and behavior at work, and establishing the baseline(More)