Pain in the buttock radiating to popliteal fossa associated with hamstring weakness can be caused by tethering of sciatic nerve proximal tendons. Contraction muscles produces traction on and subsequent symptoms.Surgical release tendons, particular from nerve, will improve symptoms function.Case series; Level evidence, 4.Forty-seven surgical releases were performed 44 patients (28 males, 16 females). The initial clinical findings imaging obtained medical notes, additional data a later...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Real-time processing of MRIs is reported as a method 3-D tracking mechanical devices within the field view using passive microcoil fiducials. The specific implementation described makes use two scan planes for full 5-DOF manipulator arm used prostate biopsy under image guidance. was observed with maximum update rate 0.42 frames per second probe velocity 10 mm/s. localization fiducials had mean...

In this paper, to harness the possibility of real-time guidance MRI, a robotic system has been developed perform transrectal prostate biopsy inside 1.5-T closed bore scanner. A specially MR pulse sequence is capable tracking needle location in real time while dynamically updating scan planes always include and target.

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> The “magic angle” effect consists of the increase in signal intensity observed at a tendon or cartilage magnetic resonance image, when tissue is oriented an angle approximately 55 <formula formulatype="inline"> <tex>$^\circ$</tex></formula> with respect to main field formulatype="inline"><tex>$B_{0}$</tex></formula>. exploitation this phenomenon often used assist diagnosis tendinous and other...

MRI provides high-resolution anatomical images and is ideal for certain image-guided interventions. Due to the physical separation between patient region of interest workspace accessible by clinician, direct force feedback from target anatomy missing during This paper demonstrates use a master-slave haptic device magnetic resonance-guided biopsy, using novel control scheme based upon neural network speed model. Results have shown feasibility proposed hardware design scheme.

Epithelioid Hemangioendothelioma is a rare primary vascular tumour, usually malignant. We present the case of 60-year-old woman who presented with hoarseness voice and persistent cough. During evaluation, left supraclavicular mass was discovered. Initial assessments revealed 30 mm mass. CT angiogram venogram confirmed an enhancing arising directly from proximal subclavian vein. Following discussion in joint multidisciplinary team, it decided to resect tumour due its malignant potential....

The magnetic fields present in the resonance (MR) environment impose severe constraints on any mechatronic device its midst, requiring alternative actuators, sensors, and materials to those conventionally used traditional system engineering. In addition spatial of closed-bore scanners require a physical separation between radiologist imaged region patient. This configuration produces loss sense touch from target anatomy for clinician, which often provides useful information. To recover force...

Medical technologies have undergone significant development to overcome the problems inherent in minimally invasive surgery such as inhibited manual dexterity, reduced visual information, and lack of direct touch feedback make it easier for surgeons operate. A tool incorporating haptic is being developed increase effectiveness diagnostic procedures by providing force feedback. Magnetic resonance imaging guidance possible allow localization; however, this engenders requirement magnetic...

Background We use a ‘Virtual Clinic’ for follow up of hip and knee replacement patients. The aim this study was to investigate patient compliance, pain function, revision rates surgeon experience using system. Methods All replacements conducted from 2000 onwards were suitable review. Between July 2014 December 2016, all patients due (at 1, 5 7 years post‐operatively, or biennially thereafter) mailed an Oxford Hip Knee Score request radiograph. A reviewed the questionnaire radiograph decided...

Abstract Background MR elastography (MRE) is an emerging technique for tumor diagnosis. MRE actuation devices require precise mechanical design and radiofrequency engineering to achieve the required vibration performance compatibility. Method A method of designing a general‐purpose, compact inexpensive actuator presented. It comprises piezoelectric bimorphs arranged in resonant structure designed operate at its frequency maximum amplitude. An analytical model was established understand...

Abstract Background: To develop mechatronic devices that are compatible with the MR environment, suitable materials must be selected, which can used correctly within magnetic fields present while not adversely affecting images. Therefore, technology sourced commercially or custom developed for use in medical devices. Method: evaluate impact a particular material has on methods to quantify interaction between scanner and object presented. A total number of 22 different geometric...

Owing to their highly ordered structure, tendons and cartilage appear with low signal intensity when imaged using magnetic resonance imaging (MRI) scanners. A significant increase in can be observed these structures are oriented at 55° (termed the magic angle) respect static field B 0 . There is a clear clinical importance exploiting this effect as part of diagnosis injury. Experimental studies phenomenon have been made harder by practical difficulties associated tissue positioning...

Nuclear magnetic resonance imaging is the latest, and currently most exciting discussed, clinical diagnostic technique. This article describes, in outline, its basic concepts methods, attempts an assessment of potential disadvantages.