scholarly journals A Novel Diagnostic Aid for Detection of Intra-Abdominal Adhesions to the Anterior Abdominal Wall Using Dynamic Magnetic Resonance Imaging

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
David Randall ◽  
John Fenner ◽  
Richard Gillott ◽  
Richard ten Broek ◽  
Chema Strik ◽  
...  
Keyword(s):  
Abdominal Cavity ◽  
Diagnostic Technique ◽  
Abdominal Adhesions ◽  
Mr Images ◽  
Clinical Images ◽  
Non Invasive ◽  
Sliding Motion ◽  
Visceral Slide ◽  
Abdominal Movement ◽  
Technique Development

Introduction. Abdominal adhesions can cause serious morbidity and complicate subsequent operations. Their diagnosis is often one of exclusion due to a lack of a reliable, non-invasive diagnostic technique. Development and testing of a candidate technique are described below.Method. During respiration, smooth visceral sliding motion occurs between the abdominal contents and the walls of the abdominal cavity. We describe a technique involving image segmentation and registration to calculate shear as an analogue for visceral slide based on the tracking of structures throughout the respiratory cycle. The presence of an adhesion is attributed to a resistance to visceral slide resulting in a discernible reduction in shear. The abdominal movement due to respiration is captured in sagittal dynamic MR images.Results. Clinical images were selected for analysis, including a patient with a surgically confirmed adhesion. Discernible reduction in shear was observed at the location of the adhesion while a consistent, gradually changing shear was observed in the healthy volunteers.Conclusion. The technique and its validation show encouraging results for adhesion detection but a larger study is now required to confirm its potential.

scholarly journals A novel diagnostic aid for intra-abdominal adhesion detection in cine-MRI: pilot study and initial diagnostic impressions

2017 ◽  
Vol 90 (1077) ◽  
pp. 20170158 ◽  
Author(s):  
David Randall ◽  
Frank Joosten ◽  
Richard Peter Ten Broek ◽  
Richard Gillott ◽  
Karna Dev Bardhan ◽  
...  
Keyword(s):  
Image Processing ◽  
Pilot Study ◽  
Clinical Judgment ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Cine Mri ◽  
Abdominal Adhesions ◽  
Diagnostic Aid ◽  
Non Invasive ◽  
Sliding Motion

Objective: A non-invasive diagnostic technique for abdominal adhesions is not currently available. Capture of abdominal motion due to respiration in cine-MRI has shown promise, but is difficult to interpret. This article explores the value of a complimentary diagnostic aid to facilitate the non-invasive detection of abdominal adhesions using cine-MRI. Method: An image processing technique was developed to quantify the amount of sliding that occurs between the organs of the abdomen and the abdominal wall in sagittal cine-MRI slices. The technique produces a “sheargram” which depicts the amount of sliding which has occurred over 1–3 respiratory cycles. A retrospective cohort of 52 patients, scanned for suspected adhesions, made 281 cine-MRI sagittal slices available for processing. The resulting sheargrams were reported by two operators and compared with expert clinical judgment of the cine-MRI scans. Results: The sheargram matched clinical judgment in 84% of all sagittal slices and 93–96% of positive adhesions were identified on the sheargram. The sheargram displayed a slight skew towards sensitivity over specificity, with a high positive adhesion detection rate but at the expense of false positives. Conclusion: Good correlation between sheargram and absence/presence of inferred adhesions indicates quantification of sliding motion has potential to aid adhesion detection in cine-MRI. Advances in knowledge: This is the first attempt to clinically evaluate a novel image processing technique quantifying the sliding motion of the abdominal contents against the abdominal wall. The results of this pilot study reveal its potential as a diagnostic aid for detection of abdominal adhesions.

scholarly journals Current status of ctDNA in precision oncology for hepatocellular carcinoma

2021 ◽  
Vol 40 (1) ◽  
Author(s):  
Yan Li ◽  
Yuanyuan Zheng ◽  
Liwei Wu ◽  
Jingjing Li ◽  
Jie Ji ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Cancer Progression ◽  
Diagnostic Technique ◽  
Response Assessment ◽  
Selection Response ◽  
Circulating Tumor Dna ◽  
Current Status ◽  
Precision Oncology ◽  
Tumor Biopsy ◽  
Non Invasive

AbstractThe conventional method used to obtain a tumor biopsy for hepatocellular carcinoma (HCC) is invasive and does not evaluate dynamic cancer progression or assess tumor heterogeneity. It is thus imperative to create a novel non-invasive diagnostic technique for improvement in cancer screening, diagnosis, treatment selection, response assessment, and predicting prognosis for HCC. Circulating tumor DNA (ctDNA) is a non-invasive liquid biopsy method that reveals cancer-specific genetic and epigenetic aberrations. Owing to the development of technology in next-generation sequencing and PCR-based assays, the detection and quantification of ctDNA have greatly improved. In this publication, we provide an overview of current technologies used to detect ctDNA, the ctDNA markers utilized, and recent advances regarding the multiple clinical applications in the field of precision medicine for HCC.

scholarly journals Role of transvaginal sonography in various gynecological disorders

2017 ◽  
Vol 6 (7) ◽  
pp. 3138
Author(s):  
Pooja J. Mise ◽  
Sangamesh J. Mise ◽  
Aditya Mise ◽  
Margol Siddappa
Keyword(s):  
Diagnostic Accuracy ◽  
Inflammatory Diseases ◽  
Diagnostic Technique ◽  
Abdominal Hysterectomy ◽  
Transvaginal Sonography ◽  
Dysfunctional Uterine Bleeding ◽  
Non Invasive ◽  
Gynecological Disorders ◽  
Dilatation And Curettage

Background: Transvaginal sonography (TVS) is a new diagnostic technique used for the evaluation of the female pelvis. The objective of the present study was to study the role of TVS and to assess the diagnostic accuracy in gynecological disorders.Methods: Total number of 100 patients attending OPDs with various complaints was selected by random technique of the study.  All the patients have informed consent and thorough clinical examination including general, systemic and pelvic examination was conducted after taking a detailed history then the patients underwent TVS followed by one of the procedures like fractional curettage, dilatation and curettage and abdominal hysterectomy (with or without conservation of ovaries) or conservative management with regular follow up.Results: The sensitivity of TVS in diagnosing dysfunctional uterine bleeding (DUB) and pelvic inflammatory diseases (PID) was 100% and specificity was 85.1% and 95% respectively. For fibroids and ovarian mass diagnosis, sensitivity was 68.9% and 80.9% respectively and specificity was 100%. Diagnostic accuracy of clinical diagnosis was 70.0% whereas TVS had 94.0% of diagnostic accuracy in diagnosing various gynecological disorders.Conclusions: The final outcome is that TVS examination is an important non-invasive investigation, can be used as important diagnostic method in various gynecological disorders as it has got a high diagnostic accuracy.

scholarly journals Dermoscopy and Trichoscopy in Dermatomyositis—A Cross-Sectional Study

2022 ◽  
Vol 11 (2) ◽  
pp. 375
Author(s):  
Magdalena Żychowska ◽  
Adam Reich
Keyword(s):  
Diagnostic Technique ◽  
Skin Lesions ◽  
Cross Sectional Study ◽  
Cutaneous Lesions ◽  
Cross Sectional ◽  
Cutaneous Manifestations ◽  
Non Invasive ◽  
Inflammatory Dermatoses ◽  
Curved Vessels ◽  
Established Role

Background: (Video)dermoscopy is a non-invasive diagnostic technique that has a well-established role in dermatooncology. In recent years, this method has also been increasingly used in the assessment of inflammatory dermatoses. So far, little is known about the (video)dermoscopic features of dermatomyositis (DM). Methods: Consecutive patients with DM were included in the study and videodermoscopic assessments of the nailfolds, scalp, and active skin lesions were performed. Results: Fifteen patients with DM (10 women and 5 men) were included. Capillaroscopy showed elongated capillaries (90.9%), avascular areas (81.8%), disorganized vessel architecture (81.8%), tortuous capillaries (72.7%), dilated capillaries (72.7%), and hemorrhages (72.7%). The trichoscopic findings included linear branched vessels (80.0%), linear vessels (60.0%), linear curved vessels (53.3%), perifollicular pigmentation (40.0%), perifollicular erythema (33.3%), scaling (20.0%), white (20.0%) or yellow (20%) interfollicular scales, and white (20.0%) or pinkish (13.3%) structureless areas. Polymorphic vessels of an unspecific distribution and white or pink structureless areas were frequently observed under dermoscopy in cutaneous manifestations of DM, including Gottron’s papules and Gottron’s sign. Conclusions: Dermoscopy of the nailfolds (capillaroscopy), scalp (tricoscopy), and active cutaneous lesions may be of value in the preliminary diagnosis of DM.

Ultrasound in paediatric cardiology — state of the art

2011 ◽  
Author(s):  
Luc L. Mertens
Keyword(s):  
Heart Disease ◽  
Cardiac Catheterization ◽  
Clinical Skills ◽  
Diagnostic Technique ◽  
Paediatric Cardiology ◽  
Non Invasive ◽  
Doppler Data ◽  
Echocardiographic Examination ◽  
Cardiac Evaluation ◽  
Ultrasound Technology

The development of ultrasound technology to visualize cardiac structures, based on the pioneering work by Edler and Hertz at the University of Lund in Sweden, has literally created a revolution in the field of paediatric cardiology. Before the era of cardiac catheterization and echocardiography the diagnosis of congenital heart disease was mainly based on combining physical findings, cardiac auscultation, electrocardiogram (ECG), and chest X-ray. This was largely based on the work by Helen B. Taussig at John Hopkins in the 1930s who established the field of clinical paediatric cardiology by integrating pathology knowledge with clinical findings. Diagnosis at that time was based on clinical skills and was more an art than science. The introduction of paediatric cardiac surgery in the 1950s was made possible due to the simultaneous development of cardiac catheterization and angiography which allowed an accurate description of the different cardiac lesions and the associated haemodynamics prior to surgery. For a long period catheterization was the diagnostic gold standard and all surgical patients underwent an invasive cardiac evaluation. In the 1970s, echocardiography was developed as a clinical tool and due to its non-invasive nature, was introduced quickly in paediatric cardiology. As anatomical diagnosis is challenging by M-mode echocardiography, it was really the development of two-dimensional (2-D) echocardiography in the late 1970s and early 1980s that deeply influenced the field. For the first time the congenital defects could be imaged noninvasively and the 2-D images were extensively validated by comparing them with pathological and surgical findings. Adding pulsed, continuous, and colour Doppler data to the 2-D images resulted in a complete detailed description of congenital cardiac defects and their haemodynamic consequences. Further optimization of ultrasound technology specifically for paediatric imaging, such as the development of higher-frequency probes and increasing the standard grey-scale frame rates, further improved spatial and temporal resolution and overall image quality. Based on its excellent diagnostic accuracy and its non-invasive nature, echocardiography quickly became the primary non-invasive diagnostic technique for all children with heart disease. Currently every paediatric patient with suspected heart disease will undergo an echocardiographic examination as the first (and often only) diagnostic test.

scholarly journals Drug interaction with radiopharmaceuticals: a review

2005 ◽  
Vol 48 (spe2) ◽  
pp. 13-27 ◽  
Author(s):  
Mario Bernardo-Filho ◽  
Sebastião David Santos-Filho ◽  
Egberto Gaspar de Moura ◽  
Adalgisa Ieda Maiworm ◽  
Margarida Maria de Camões Orlando ◽  
...  
Keyword(s):  
Blood Cells ◽  
Plasma Proteins ◽  
White Blood Cells ◽  
Occupational Therapists ◽  
Medical Procedures ◽  
Correct Interpretation ◽  
Biological Models ◽  
Clinical Images ◽  
Non Invasive

Clinical images are worthwhile in Health Sciences and their analysis and correct interpretation aid the professionals,such as physicians, physiotherapists and occupational therapists, to make decisions and take subsequent therapeutic and/or rehabilitation measures. Other factors, besides the state of the disease, may interfere and affect the bioavailability of the radiopharmaceuticals (radiobiocomplexes) and the quality of the SPECT and PET images. Furthermore, the labeling of some of these radiobiocomplexes, such as plasma proteins, white blood cells and red blood cells, with 99mT, can also be modified. These factors include drugs (synthetic and natural) and dietary conditions, as well as some medical procedures (invasive or non-invasive), such as radiation therapy, surgical procedures, prostheses, cardioversion, intubation, chemoperfusion, external massage, immunotherapy, blood transfusion and hemodialysis. In conclusion, the knowledge about these factors capable of interfering with the bioavailability of the radiobiocomplexes is worthwhile for secure diagnosis. Moreover, the development of biological models to study these phenomena is highly relevant and desirable.

scholarly journals A disposable, ultra-fine endoscope for non-invasive, close examination of the intraluminal surface of the peritoneal dialysis catheter and peritoneal cavity

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Masaaki Nakayama ◽  
Chieko Hamada ◽  
Keitaro Yokoyama ◽  
Yudo Tanno ◽  
Nanae Matsuo ◽  
...  
Keyword(s):  
Peritoneal Dialysis ◽  
Clinical Study ◽  
Peritoneal Cavity ◽  
Abdominal Cavity ◽  
Peritoneal Dialysis Catheter ◽  
Peritoneal Membrane ◽  
Non Invasive ◽  
Luminal Side ◽  
Stage Renal Disease ◽  
End Stage

Abstract The ability to visualize intraluminal surface of peritoneal dialysis (PD) catheter and peritoneal cavity could allow elucidation of the cases of outflow problems, and provide information on changes to the peritoneal membrane leading to encapsulating peritoneal sclerosis. A non-invasive examination that allows those monitoring in need is desirable. We have developed a disposable ultra-fine endoscope that can be inserted into the lumen of the existing PD catheter, allowing observation of the luminal side of the catheter and peritoneal cavity from the tip of the PD catheter, with minimum invasion in practice. In a pre-clinical study in pigs and a clinical study in 10 PD patients, the device provided detailed images, enabling safe, easy observation of the intraluminal side of the entire catheter, and of the morphology and status of the peritoneal surface in the abdominal cavity under dwelling PD solution. Since this device can be used repeatedly during PD therapy, clinical application of this device could contribute to improved management of clinical issues in current PD therapy, positioning PD as a safer, more reliable treatment modality for end-stage renal disease.

Tympanic plethysmography in glomus jugulare tumours

1981 ◽  
Vol 95 (6) ◽  
pp. 589-595
Author(s):  
Sayed Tewfik
Keyword(s):  
Pressure Transducer ◽  
Diagnostic Technique ◽  
X Rays ◽  
Axial Tomography ◽  
Non Invasive ◽  
Glomus Jugulare ◽  
Diagnostic Technology ◽  
Carotid Aneurysms ◽  
Pressure Changes ◽  
Degree Of Extension

SummaryTympanic plethysmography is a simple non-invasive diagnostic technique which is used to differentiate between intra-temporal carotid aneurysms and glomus jugulare tumours and to predict the degree of extension of the tumour. It is performed by the indirect recording of volume pressure changes of pulsating tympanic masses using a pressure transducer. The volume pressure change of the pulsating mass is transmitted to the pressure transducer through a saline-filled system.Medical technology has undergone considerable progress with the introduction of new techniques in medical diagnosis less harmful to the patient and with a reduced risk of complications. The collaboration of doctors, scientists and bioengineers has resulted in the evolution of such changes, thereby trying to replace the more aggressive or invasive diagnostic techniques. The ideal diagnostic technology is one without pain, harm or complications to the patient.Medical diagnostic technology may be classified as invasive or noninvasive. Non-invasive diagnostic technology is either active, using an external source of energy such as ultrasound (ultrasonography) or a small dose of X-rays, as in computerized axial tomography; or passive, using the energy emitted by human structures, as in plethysmography.Plethysmography is the recording of volume pressure changes. Oculoplethysmography is used to monitor extracranial occlusive carotid disease (Kartchner and McRae, 1973). The use of sound energy as an internal energy emitted by the human body has proved effective as a passive, non-invasive diagnostic technique (Tewfik, 1976, 1977).Volume pressure changes of intra-temporal carotid aneurysms have been recorded, using a pressure transducer (Tewfik, 1974).In this article the volume pressure changes of glomus jugulare tumours have been recorded and the findings compared with those obtained, and previously published, for intra-temporal carotid aneurysms. Volume pressure changes of pulsating tympanic masses may be called tympanic plethysmography. A trial of this simple non-invasive diagnostic technique for differentiating pulsating tympanic masses is here reported, together with an assessment of the technique in its ability to predict the degree of extension of glomus jugulare tumours.

A Non-Invasive Study Using MR-Derived Wave Intensity Analysis to Highlight the Effect of Surgical Arch Reconstruction on Ventriculo-Arterial Coupling in Patients With Hypoplastic Left Heart Syndrome

2012 ◽  
Author(s):  
Giovanni Biglino ◽  
Hopewell Ntsinjana ◽  
Jennifer A. Steeden ◽  
Catriona Baker ◽  
Silvia Schievano ◽  
...  
Keyword(s):  
Aortic Arch ◽  
Hypoplastic Left Heart Syndrome ◽  
Surgical Reconstruction ◽  
Intensity Analysis ◽  
Left Heart ◽  
Wave Intensity Analysis ◽  
Mr Images ◽  
Hypoplastic Left Heart ◽  
Non Invasive ◽  
Left Heart Syndrome

Hypoplastic left heart syndrome (HLHS) is a congenital heart disease whose staged surgical palliation aims to progressively separate the systemic and pulmonary circulations. The first stage or Norwood procedure [1] involves surgical reconstruction of the aortic arch, usually with pulmonary homograft patch [2]. Recent evidence suggested that, because of this extensive reconstruction, HLHS patients have abnormal elastic properties [3] and reduced distensibility [4,5] of the ascending aorta. However, the impact of the reconstructed aorta and its abnormal elastic properties on ventricular mechanics, i.e. ventriculo-arterial coupling mismatch, has not been assessed. In the light of this mismatch, a change in impedance on the arterial side will reflect on the ventricular side and quantification of this phenomenon may provide mechano-energetic information for further understanding a complex physiology such as palliated HLHS with aortic arch surgical reconstruction. In this study we suggest that wave intensity analysis (WIA) is a valid method for studying ventriculo-arterial coupling, as WIA is a hemodynamic index able to assess the performance of the heart and its interaction with arterial system. Previously, distensibility quantification necessitated either of invasive [5] or cuff [4] arterial pressure monitoring, or multiple magnetic resonance (MR) images acquisitions for transit time wave speed calculation [6]. Instead, here we propose a non-invasive and semi-automated method based only on MR images analysis, with single slice analysis for estimate of local distensibility. The method, including WIA, was developed as a plug-in for DICOM viewer OsiriX, and applied to two cohorts of single ventricle patients.

Upconversion nanoparticle and gold nanocage satellite assemblies for sensitive ctDNA detection in serum

The Analyst ◽  
2020 ◽  
Vol 145 (16) ◽  
pp. 5553-5562
Author(s):  
Jiawei Wang ◽  
Guanping Hua ◽  
Lihuang Li ◽  
Danyang Li ◽  
Fanfan Wang ◽  
...  
Keyword(s):  
Liquid Biopsy ◽  
Diagnostic Technique ◽  
Circulating Tumor Dna ◽  
Molecular Diagnostic ◽  
Non Invasive ◽  
Timely Diagnosis ◽  
Diagnosis Of Cancer ◽  
Biopsy Methods ◽  
Clinically Significant ◽  
Tumor Dna

A rapid molecular diagnostic technique targeting circulating tumor DNA (ctDNA) has become one of the most clinically significant liquid biopsy methods for non-invasive and timely diagnosis of cancer.

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