scholarly journals A Review of the Vibration Arthrography Technique Applied to the Knee Diagnostics

2021 ◽  
Vol 11 (16) ◽  
pp. 7337
Author(s):  
Sophie de Tocqueville ◽  
Mihaela Marjin ◽  
Michal Ruzek
Keyword(s):  
Knee Joint ◽  
Range Of Motion ◽  
Vibrational Analysis ◽  
Physiological Signals ◽  
Research Progress ◽  
X Rays ◽  
Non Invasive ◽  
Invasive Method ◽  
Knee Disorders

When a joint undergoes a range of motion, its constituents rub against each other, causing friction and thus vibrations. The vibration arthrography (VAG) technique consists of detecting, recording, and processing those vibrations to diagnose disorders. This non-invasive method could be an alternative to the currently used arthroscopy or X-rays. It has been revealed to be as accurate as these methods in terms of detecting pathologies such as osteoarthritis (OA). Moreover, vibrational analysis has highlighted some physiological signals associated with the displacement of knee joint components. Thus, vibroarthrography provides further understanding of the internal mechanisms of the knee joint. This paper aims to examine the research progress on the use of this vibration arthrography technique in diagnosing knee disorders.

scholarly journals A novel non-invasive method for measuring knee joint laxity in four dof: In vitro proof-of-concept and validation

2019 ◽  
Vol 82 ◽  
pp. 62-69 ◽  
Author(s):  
D. Pedersen ◽  
V. Vanheule ◽  
R. Wirix-Speetjens ◽  
O. Taylan ◽  
HP. Delport ◽  
...  
Keyword(s):  
Knee Joint ◽  
Joint Laxity ◽  
Proof Of Concept ◽  
Non Invasive ◽  
Knee Joint Laxity ◽  
Invasive Method

A Non-invasive Method to Measure Joint Range of Motion for Hip Joints

2010 ◽  
pp. 27-32
Author(s):  
Noriko Masuta ◽  
Makoto Yagihashi ◽  
Hirohisa Narita ◽  
Hideo Fujimoto
Keyword(s):  
Range Of Motion ◽  
Hip Joints ◽  
Non Invasive ◽  
Joint Range Of Motion ◽  
Invasive Method ◽  
Joint Range

scholarly journals Molecular Photoacoustic Imaging

Bionatura ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 2351-2355
Author(s):  
Eduardo Cepeda ◽  
Katherine Narváez
Keyword(s):  
Acoustic Waves ◽  
Laser Light ◽  
Photoacoustic Imaging ◽  
The Body ◽  
Biological Processes ◽  
X Rays ◽  
Sound Waves ◽  
Non Invasive ◽  
Light Waves ◽  
Invasive Method

Medicine has gone through several challenges to make it much more accurate and thus prolong the human being's life. A large part of this challenge is diseased, so early detection can help carry out treatment on time. There is a technology that allows detecting an abnormality within the body without using an invasive method. Ultrasound is a diagnostic test used to scan organs and tissues through sound waves. Although this technique has been widely used, the results are not desired because the images generated are not high resolution. On the other hand, X-rays are used because it presents an image with a much higher resolution than other techniques based on light waves or ultrasound; despite this, they are harmful to cells. In consequence of this problem, another method called molecular photoacoustic imaging has been implemented. This technique bridges the traditional depth limits of ballistic optical imaging and diffuse optical imaging's resolution limits, using the acoustic waves generated in response to laser light absorption, which has now shown potential for molecular imaging, allowing the visualization of biological processes in a non-invasive way. The purpose of this article is to give a critically scoped review of the physical, chemical, and biochemical characteristics of existing photoacoustic contrast agents, highlighting the pivotal applications and current challenges for molecular photoacoustic imaging.

scholarly journals Isolated Dislocation of Proximal Tibiofibular Joint

2014 ◽  
Vol 2 (11_suppl3) ◽  
pp. 2325967114S0027 ◽  
Author(s):  
Alper Oktay ◽  
Ozgur Baysal ◽  
Engin Ecevız ◽  
Nurzat Elmalı
Keyword(s):  
Knee Joint ◽  
Physical Examination ◽  
Range Of Motion ◽  
Rare Condition ◽  
Proximal Tibiofibular Joint ◽  
X Rays ◽  
Mri Findings ◽  
Joint Injury ◽  
Tibiofibular Joint ◽  
Joint Luxation

Objectives: Proximal tibiofibular joint luxation is very rare condition and usually missed in the ED. The aim of the study is if a patient is brought to ED with knee injury, we should keep in mind this pathology. Methods: A 23 year old man was admitted to emergency department with knee pain and restricted movement of the knee during the football match. Physical examination revealed mild swelling and limited ROM on his knee. We took AP and lateral X-rays immediately. We diagnosed the proximal tibiofibular luxation with X-rays. After diagnosing this injury we reducted this joint luxation with closed reduction immediately. Knee joint was immobilized with casting. Magnetic resonance imaging was applied. Casting was removed three weeks later after the diagnosis. Passive range of motion exercises were applied. Results: In the second month examination, there is no pain in his knee joint and the range of motion was full. There was no neoruvascular pathology in the physical examination of the knee. In the MRI findings proximal tibiofibular ligament had mild eudema, there was a contusion area in the lateral plateau and the other knee ligaments was normal. Conclusion: Proximal tibiofibular joint injury is very uncommon pathology, If the pathology is diagnosed on time , it can be treated appropriately to prevent unnecessary complication. The main problem of this injury is correct and timely diagnosis

Malfunctional Reorganization in the Developing Limbo-Prefrontal System in Animals: Implications for Human Psychoses?

2001 ◽  
Vol 12 (1) ◽  
pp. 8-14
Author(s):  
Gertraud Teuchert-Noodt ◽  
Ralf R. Dawirs
Keyword(s):  
Prefrontal Cortex ◽  
Mental Disorders ◽  
Dentate Gyrus ◽  
Cognitive Functions ◽  
Experimental Approach ◽  
Regulatory Mechanisms ◽  
Hippocampal Dentate Gyrus ◽  
Non Invasive ◽  
Invasive Method ◽  
Activity Dependent

Abstract: Neuroplasticity research in connection with mental disorders has recently bridged the gap between basic neurobiology and applied neuropsychology. A non-invasive method in the gerbil (Meriones unguiculus) - the restricted versus enriched breading and the systemically applied single methamphetamine dose - offers an experimental approach to investigate psychoses. Acts of intervening affirm an activity dependent malfunctional reorganization in the prefrontal cortex and in the hippocampal dentate gyrus and reveal the dopamine position as being critical for the disruption of interactions between the areas concerned. From the extent of plasticity effects the probability and risk of psycho-cognitive development may be derived. Advance may be expected from insights into regulatory mechanisms of neurogenesis in the hippocampal dentate gyrus which is obviously to meet the necessary requirements to promote psycho-cognitive functions/malfunctions via the limbo-prefrontal circuit.

scholarly journals CT perfusion in peripheral arterial disease—hemodynamic differences before and after revascularisation

2021 ◽  
Author(s):  
Patrick Veit-Haibach ◽  
Martin W. Huellner ◽  
Martin Banyai ◽  
Sebastian Mafeld ◽  
Johannes Heverhagen ◽  
...  
Keyword(s):  
Peripheral Arterial Disease ◽  
Ct Perfusion ◽  
Arterial Disease ◽  
Lower Leg ◽  
Therapy Control ◽  
Non Invasive ◽  
Before And After ◽  
Invasive Method ◽  
The Mean ◽  
Peripheral Arterial

Abstract Objectives The purpose of this study was the assessment of volumetric CT perfusion (CTP) of the lower leg musculature in patients with symptomatic peripheral arterial disease (PAD) before and after interventional revascularisation. Methods Twenty-nine consecutive patients with symptomatic PAD of the lower extremities requiring interventional revascularisation were assessed prospectively. All patients underwent a CTP scan of the lower leg, and hemodynamic and angiographic assessment, before and after intervention. Ankle-brachial pressure index (ABI) was determined. CTP parameters were calculated with a perfusion software, acting on a no outflow assumption. A sequential two-compartment model was used. Differences in CTP parameters were assessed with non-parametric tests. Results The cohort consisted of 24 subjects with an occlusion, and five with a high-grade stenosis. The mean blood flow before/after (BFpre and BFpost, respectively) was 7.42 ± 2.66 and 10.95 ± 6.64 ml/100 ml*min−1. The mean blood volume before/after (BVpre and BVpost, respectively) was 0.71 ± 0.35 and 1.25 ± 1.07 ml/100 ml. BFpost and BVpost were significantly higher than BFpre and BVpre in the treated limb (p = 0.003 and 0.02, respectively), but not in the untreated limb (p = 0.641 and 0.719, respectively). Conclusions CTP seems feasible for assessing hemodynamic differences in calf muscles before and after revascularisation in patients with symptomatic PAD. We could show that CTP parameters BF and BV are significantly increased after revascularisation of the symptomatic limb. In the future, this quantitative method might serve as a non-invasive method for surveillance and therapy control of patients with peripheral arterial disease. Key Points • CTP imaging of the lower limb in patients with symptomatic PAD seems feasible for assessing hemodynamic differences before and after revascularisation in PAD patients. • This quantitative method might serve as a non-invasive method, for surveillance and therapy control of patients with PAD.

scholarly journals Asymmetric TCD Findings in Malignant MCA Infarction, Resolution after Decompressive Hemicraniectomy: A Case Report

2020 ◽  
Vol 12 (Suppl. 1) ◽  
pp. 127-136
Author(s):  
Hazel Gaile  Barrozo ◽  
Maria Anna De Guzman ◽  
Jose  Navarro ◽  
Narayanaswamy Venketasubramanian
Keyword(s):  
Pressure Effects ◽  
Mean Flow ◽  
Brain Swelling ◽  
Decompressive Hemicraniectomy ◽  
Non Invasive ◽  
Invasive Method ◽  
Malignant Mca Infarction ◽  
Subsequent Rise ◽  
Very High ◽  
Hemispheric Infarct

Transcranial Doppler (TCD) is a non-invasive method for assessing cerebral hemodynamics in the acute phase of stroke. We report a case of a 33-year-old man who presented with a massive left hemispheric infarct developing into “malignant” MCA infarction. TCD was utilized to monitor intracranial hemodynamics while the clinical and neuroimaging findings were used to help us in the decision to proceed with decompressive craniectomy (DC). Pre-operatively, there was reduced mean flow velocities (MFV) of the middle cerebral artery (MCA) with increasing pulsatility index (PI) ipsilateral to the infarct. The subsequent but smaller rise in the PI in the contralateral MCA was suggestive of very high intracranial pressure (ICP) from massive brain swelling. Serial TCD examinations post-operatively showed normalization of the PI, and subsequent rise in the left MCA MFV. Clinical improvement was also noted as the TCD findings improved. The asymmetry in TCD findings can be attributed to occlusion of the MCA with subsequent spontaneous recanalisation, occlusion of the MCA with subsequent recanalisation due to the DC, or initial occlusion and subsequent pressure effects on the arterioles of the MCA due to the “malignant” edema of that hemisphere that was relieved by DC. This case illustrates the value of TCD as a useful modality in monitoring intracranial hemodynamics in acute stroke.

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