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https://www.readbyqxmd.com/read/27921155/comparison-of-two-and-three-dimensional-measurement-of-the-cobb-angle-in-scoliosis
#1
Ricarda Lechner, David Putzer, Dietmar Dammerer, Michael Liebensteiner, Christian Bach, Martin Thaler
PURPOSE: The Cobb angle as an objective measure is used to determine the progression of deformity, and is the basis in the planning of conservative and surgical treatment. However, studies have shown that the Cobb angle has two limitations: an inter- and intraobserver variability of the measurement is approximately 3-5 degrees, and high variability regarding the definition of the end vertebra. Scoliosis is a three-dimensional (3D) pathology, and 3D pathologies cannot be completely assessed by two-dimensional (2D) methods, like 2D radiography...
December 5, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27921094/fetal-cerebellar-vermis-circumference-measured-by-2-dimensional-ultrasound-scan-reference-range-feasibility-and-reproducibility
#2
M Spinelli, C Sica, L D Meglio, D Bolla, L Raio, D Surbek
Purpose: To provide 2-dimensional ultrasonographic (2D-US) normograms of cerebellar vermis biometry, as well as to evaluate the feasibility and the reproducibility of these measurements in clinical practice. Materials and Methods: A prospective cross-sectional study of 328 normal singleton pregnancies between 18 and 33 weeks of gestation. Measurements of the fetal cerebellar vermis circumference (VC) in the mid-sagittal plane were performed by both a senior and a junior operator using 2D-US. VC as a function of gestational age (GA) was expressed by regression equations...
November 2016: Ultrasound International Open
https://www.readbyqxmd.com/read/27916237/transesophageal-speckle-tracking-echocardiography-improves-right-ventricular-systolic-function-assessment-in-the-perioperative-setting
#3
Nicholas W Markin, Mohammed Chamsi-Pasha, Jiangtao Luo, Walker R Thomas, Tara R Brakke, Thomas R Porter, Sasha K Shillcutt
BACKGROUND: Perioperative evaluation of right ventricular (RV) systolic function is important to follow intraoperative changes, but it is often not possible to assess with transthoracic echocardiographic (TTE) imaging, because of surgical field constraints. Echocardiographic RV quantification is most commonly performed using tricuspid annular plane systolic excursion (TAPSE), but it is not clear whether this method works with transesophageal echocardiographic (TEE) imaging. This study was performed to evaluate the relationship between TTE and TEE TAPSE distances measured with M-mode imaging and in comparison with speckle-tracking TTE and TEE measurements...
December 1, 2016: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/27915451/interobserver-agreement-in-detection-of-white-globe-appearance-and-the-ability-of-educational-lectures-to-improve-the-diagnosis-of-gastric-lesions
#4
Hitoshi Omura, Naohiro Yoshida, Tomoyuki Hayashi, Kazuhiro Miwa, Hajime Takatori, Hirokazu Tsuji, Katsuhisa Inamura, Yukihiro Shirota, Hiroyuki Aoyagi, Takaharu Masunaga, Kazuyoshi Katayanagi, Hiroshi Kurumaya, Shuichi Kaneko, Hisashi Doyama
BACKGROUND: White globe appearance (WGA) refers to a small white lesion of globular shape underneath cancerous gastric epithelium that can be clearly visualized by magnifying endoscopy with narrowband imaging (M-NBI). WGA has been reported to be a novel endoscopic marker that is highly specific in differentiating early gastric cancer (GC) from low-grade adenoma, and has a significantly higher prevalence in early GCs than in noncancerous lesions. However, interobserver agreement in detecting WGA and whether training intervention can improve diagnostic accuracy are unknown...
December 3, 2016: Gastric Cancer
https://www.readbyqxmd.com/read/27914183/interphalangeal-joint-sonography-of-symptomatic-hand-osteoarthritis-clinical-and-functional-correlation
#5
Natalia de Oliva Spolidoro Paschoal, Jamil Natour, Flavia S Machado, Hilda Alcântara Veiga de Oliveira, Rita Nely Vilar Furtado
OBJECTIVES: To assess the correlation between inflammatory sonographic findings (grayscale synovial hypertrophy and power Doppler) and clinical and functional assessments in hand osteoarthritis (symptomatic interphalangeal joints) and to correlate the intraobserver and interobserver reliability of these findings. METHODS: A prospective double-blind study of 60 interphalangeal joints was conducted. The joints were assessed 6 times per year by clinician and sonographer observers...
December 3, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27913946/diagnostic-reproducibility-what-happens-when-the-same-pathologist-interprets-the-same-breast-biopsy-specimen-at-two-points-in-time
#6
Sara L Jackson, Paul D Frederick, Margaret S Pepe, Heidi D Nelson, Donald L Weaver, Kimberly H Allison, Patricia A Carney, Berta M Geller, Anna N A Tosteson, Tracy Onega, Joann G Elmore
BACKGROUND: Surgeons may receive a different diagnosis when a breast biopsy is interpreted by a second pathologist. The extent to which diagnostic agreement by the same pathologist varies at two time points is unknown. METHODS: Pathologists from eight U.S. states independently interpreted 60 breast specimens, one glass slide per case, on two occasions separated by ≥9 months. Reproducibility was assessed by comparing interpretations between the two time points; associations between reproducibility (intraobserver agreement rates); and characteristics of pathologists and cases were determined and also compared with interobserver agreement of baseline interpretations...
December 2, 2016: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/27913913/improved-image-quality-in-abdominal-ct-in-patients-who-underwent-treatment-for-hepatocellular-carcinoma-with-small-metal-implants-using-a-raw-data-based-metal-artifact-reduction-algorithm
#7
Keitaro Sofue, Takeshi Yoshikawa, Yoshiharu Ohno, Noriyuki Negi, Hiroyasu Inokawa, Naoki Sugihara, Kazuro Sugimura
OBJECTIVES: To determine the value of a raw data-based metal artifact reduction (SEMAR) algorithm for image quality improvement in abdominal CT for patients with small metal implants. METHODS: Fifty-eight patients with small metal implants (3-15 mm in size) who underwent treatment for hepatocellular carcinoma were imaged with CT. CT data were reconstructed by filtered back projection with and without SEMAR algorithm in axial and coronal planes. To evaluate metal artefact reduction, mean CT number (HU and SD) and artefact index (AI) values within the liver were calculated...
December 2, 2016: European Radiology
https://www.readbyqxmd.com/read/27913175/automated-cta-based-measurements-for-planning-support-of-minimally-invasive-aortic-valve-replacement-surgery
#8
Mustafa A Elattar, Floortje van Kesteren, Esther M Wiegerinck, Ed Vanbavel, Jan Baan, Riccardo Cocchieri, Bas de Mol, Nils R Planken, Henk A Marquering
Minimally invasive aortic valve replacement (mini-AVR) procedures are a valuable alternative to conventional open heart surgery. Currently, planning of mini-AVR consists of selection of the intercostal space closest to the sinotubular junction on preoperative computer tomography images. We developed an automated algorithm detecting the sinotubular junction (STJ) and intercostal spaces for finding the optimal incision location. The accuracy of the STJ detection was assessed by comparison with manual delineation by measuring the Euclidean distance between the manually and automatically detected points...
November 29, 2016: Medical Engineering & Physics
https://www.readbyqxmd.com/read/27913107/the-influence-of-iterative-reconstruction-on-coronary-artery-calcium-scoring-phantom-and-clinical-studies
#9
Seitaro Oda, Daisuke Utsunomiya, Takeshi Nakaura, Yoshinori Funama, Hideaki Yuki, Masafumi Kidoh, Kenichiro Hirata, Narumi Taguchi, Keiichi Honda, Hiroko Takaoka, Yuji Iyama, Kazuhiro Katahira, Katsuo Noda, Shuichi Oshima, Shinichi Tokuyasu, Yasuyuki Yamashita
RATIONALE AND OBJECTIVES: We compared the effect of iterative model reconstruction (IMR), filtered back projection (FBP), and hybrid iterative reconstruction (HIR) on coronary artery calcium (CAC) scoring. MATERIALS AND METHODS: CAC scans of 30 consecutive patients (18 men and 12 women, age 70.1 ± 12.2 years) were reconstructed with FBP, HIR, and IMR, and the image noise was measured on all images. Two radiologists independently measured the CAC scores using semiautomated software, and interobserver agreement was evaluated...
November 29, 2016: Academic Radiology
https://www.readbyqxmd.com/read/27913052/evaluation-of-erg-and-pten-protein-expression-in-cribriform-architecture-prostate-carcinomas
#10
Michelle R Downes, Swati Satturwar, Dominique Trudel, Theo H van der Kwast
ERG and PTEN have been suggested as potential prognostic markers in prostatic adenocarcinoma. We assessed the relationship between ERG and PTEN protein expression in cribriform architecture prostatic carcinomas and adjacent acinar non-cribriform carcinoma and determined the interobserver variability in assessment of these markers. A contemporary cohort of radical prostatectomy cases (n=246) were reviewed and cribriform architecture carcinomas (intraductal carcinoma and cribriform Gleason 4 carcinomas) were identified and confirmed with triple cocktail immunostaining...
October 26, 2016: Pathology, Research and Practice
https://www.readbyqxmd.com/read/27909536/screening-for-atrial-fibrillation-in-the-community-using-a-novel-ecg-recorder
#11
Irma Battipaglia Md, Katrina Gilbert BSc, Andrew J Hogarth Md PhD, Muzahir H Tayebjee Md
Aims: MyDiagnostick (MDK) is a novel portable ECG recorder. We conducted this study to evaluate its role in screening for atrial fibrillation (AF). Methods: The device is a cylindrical rod with metallic electrodes at both ends recording electrocardiogram (ECG) when both electrodes are held. Individuals were requested to hold the device for approximately 15 s, the device was then connected to a laptop (with proprietary software downloaded) and analysed. Anonymised ECGs were stored for further analysis. A total of 855 ECGs were recorded and analysed offline by two arrhythmia specialists assessing ECG quality, in particular the level of noise...
August 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27909143/interobserver-and-intraobserver-reliability-of-clinical-assessments-in-knee-osteoarthritis
#12
Nasimah Maricar, Michael J Callaghan, Matthew J Parkes, David T Felson, Terence W O'Neill
OBJECTIVE: Clinical examination of the knee is subject to measurement error. The aim of this analysis was to determine interobserver and intraobserver reliability of commonly used clinical tests in patients with knee osteoarthritis (OA). METHODS: We studied subjects with symptomatic knee OA who were participants in an open-label clinical trial of intraarticular steroid therapy. Following standardization of the clinical test procedures, 2 clinicians assessed 25 subjects independently at the same visit, and the same clinician assessed 88 subjects over an interval period of 2-10 weeks; in both cases prior to the steroid intervention...
December 2016: Journal of Rheumatology
https://www.readbyqxmd.com/read/27908190/accuracy-reproducibility-and-uncertainty-analysis-of-thyroid-probe-based-activity-measurements-for-determination-of-dose-calibrator-settings
#13
Pedro L Esquinas, Jesse Tanguay, Marjorie Gonzalez, Milan Vuckovic, Cristina Rodríguez-Rodríguez, Urs O Häfeli, Anna Celler
PURPOSE: In the nuclear medicine department, the activity of radiopharmaceuticals is measured using dose calibrators (DCs) prior to patient injection. The DC consists of an ionization chamber that measures current generated by ionizing radiation (emitted from the radiotracer). In order to obtain an activity reading, the current is converted into units of activity by applying an appropriate calibration factor (also referred to as DC dial setting). Accurate determination of DC dial settings is crucial to ensure that patients receive the appropriate dose in diagnostic scans or radionuclide therapies...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27908181/defining-and-assessing-an-anisotropic-delineation-margin-for-modern-radiotherapy
#14
L R Bell, E M Pogson, P E Metcalfe, L C Holloway
PURPOSE: Uncertainty in target volume delineation for modern radiotherapy impacts dosimetry and patient outcomes. Delineation uncertainty is generally overlooked in practice as a source of error, potentially since historically, other uncertainties have been the main focus. This work defined and assessed an anisotropic delineation margin in both polar and spherical coordinate systems in order to account for the spatially varying nature of this uncertainty using a whole breast radiotherapy cohort as a proof of concept...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27906770/the-effect-of-two-factors-on-interobserver-reliability-for-proximal-humeral-fractures
#15
Jos J Mellema, Michael T Kuntz, Thierry G Guitton, David Ring
INTRODUCTION: The purpose of this study was to assess whether training observers and simplifying proximal humeral fracture classifications improve interobserver reliability among a large number of orthopaedic surgeons. METHODS: One hundred eighty-five observers were randomized to receive training or no training in a simple classification for proximal humeral fractures before evaluating preoperative radiographs of a consecutive series of 30 patients who were treated with open reduction and internal fixation...
November 30, 2016: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/27906744/reliability-of-sagittal-spinopelvic-alignment-measurements-after-total-hip-arthroplasty
#16
Katri Pernaa, Matti Seppänen, Keijo Mäkelä, Mikhail Saltychev
STUDY DESIGN: This is a observational study. OBJECTIVE: To evaluate the reliability of measuring sagittal spinopelvic alignment after hip arthroplasty. SUMMARY OF BACKGROUND DATA: Pelvic incidence (PI), sacral slope (SS), pelvic tilt (PT), and lumbar lordosis (LL) are widely used in planning the treatment of people with spinal and hip disorders. Previously, these measures have proved reliable when hip heads are intact. Thus far, it is not known whether they are also reliable after total hip replacement...
November 30, 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27906740/a-new-method-of-measuring-the-occipitocervical-angle-that-could-be-applied-as-an-intraoperative-indicator-during-occipitocervical-fusion
#17
Shingo Nagashima, Masateru Nagae, Yuji Arai, Hitoshi Tonomura, Ryota Takatori, Tsuyoshi Sukenari, Hiroyoshi Fujiwara, Koshiro Sawada, Yasuo Mikami, Toshikazu Kubo
STUDY DESIGN: A method for measuring occipitocervical angle. OBJECTIVE: To develop a new method of measurement for assessing the occipitocervical angle using intraoperative fluoroscopic imaging, and to examine its reliability. SUMMARY OF BACKGROUND DATA: To avoid postoperative complications following occipitocervical fusion, it is vital to obtain a suitable fusion angle between the occipital bone and the upper cervical spine. MATERIALS AND METHODS: The subjects were 30 cases with occipito-atlanto-axial lesions and 30 healthy volunteers...
November 30, 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27903592/alpha-angle-measurements-in-healthy-adult-volunteers-vary-depending-on-the-mri-plane-acquisition-used
#18
Mohammad Golfam, Luigia A Di Primio, Paul E Beaulé, Kalesha Hack, Mark E Schweitzer
BACKGROUND: It has been shown that cam deformities are located at a more anterosuperior location than was previously described. PURPOSE: To establish, in a large group of asymptomatic participants, the normative range of the alpha angle in the anterosuperior location in both the oblique axial and radial views of magnetic resonance imaging (MRI). STUDY DESIGN: Cross-sectional study; Level of evidence, 3. METHODS: In 197 asymptomatic participants (394 asymptomatic hips) with a mean age of 29...
November 9, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27900924/-persistent-shoulder-symptoms-in-calcific-tendinitis-clinical-and-radiological-predictors
#19
P B de Witte, R A van Adrichem, J W Selten, J Nagels, M Reijnierse, R G H H Nelissen
OBJECTIVE: We assessed the most important demographics and radiological characteristics at the time of diagnosis of rotator cuff calcific tendinitis (RCCT), and their associations with long-term clinical outcome. DESIGN: Observational study. METHOD: Baseline characteristics and treatment were evaluated in 342 patients in whom RCCT had been diagnosed. Interobserver agreement of the radiological investigations was analysed. Patients were sent a general questionnaire and 2 shoulder questionnaires, the "Western Ontario rotator cuff" (WORC) and the "Disabilities of the arm, shoulder and hand" (DASH) for evaluation of long-term clinical outcome...
2016: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/27900714/is-there-asymmetry-between-the-concave-and-convex-pedicles-in-adolescent-idiopathic-scoliosis-a-ct-investigation
#20
Colin M Davis, Caroline A Grant, Mark J Pearcy, Geoffrey N Askin, Robert D Labrom, Maree T Izatt, Clayton J Adam, J Paige Little
BACKGROUND: Adolescent idiopathic scoliosis is a complex three-dimensional deformity of the spine characterized by deformities in the sagittal, coronal, and axial planes. Spinal fusion using pedicle screw instrumentation is a widely used method for surgical correction in severe (coronal deformity, Cobb angle > 45°) adolescent idiopathic scoliosis curves. Understanding the anatomic difference in the pedicles of patients with adolescent idiopathic scoliosis is essential to reduce the risk of neurovascular or visceral injury through pedicle screw misplacement...
November 29, 2016: Clinical Orthopaedics and related Research
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