Diagnostic Accuracy of Fluoroscopy, Radiography, and Computed Tomography in Detecting Cement Leakage in Kyphoplasty

2018 ◽  
Vol 79 (06) ◽  
pp. 502-510 ◽  
Author(s):  
Hans-Georg Palm ◽  
Patricia Lang ◽  
Madlen Haentzsch ◽  
Benedikt Friemert ◽  
Carsten Hackenbroch ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Sensitivity ◽  
Complete Information ◽  
Cement Leakage ◽  
The Other ◽  
Lower Sensitivity ◽  
Intraoperative Fluoroscopy ◽  
Vertebral Bodies ◽  
Visualization Techniques ◽  
Cement Extravasation

Purpose Cement leakage is a typical complication of kyphoplasty for vertebral fractures. It is unclear if cement application intraoperatively can be improved by using other techniques of visualization and which kind of postoperative imaging should be recommended to detect cement extravasation accurately. Objective To compare the rates of cement leakage detected by intraoperative fluoroscopy, postoperative radiography, and postoperative computed tomography (CT) in a retrospective study. Patients and Methods The study included 78 patients (60 women and 18 men; 115 vertebral bodies) who were treated with two kinds of kyphoplasty. The patients underwent intraoperative fluoroscopy and postoperative radiography and CT. After surgery, the images were evaluated to compare cement leakage rates and locations in the three visualization techniques. Leakage locations were described as epidural, intradiskal, extravertebral, or intravascular. Results Compared with CT, intraoperative fluoroscopy regularly detected intradiskal leakage (75%) but had a considerably lower sensitivity for visualizing epidural (21%), extravertebral (31%), and intravascular (51%) cement leakages. A comparison of radiography and CT showed that radiography had a high sensitivity for detecting intradiskal (82%) and intravascular (70%) cement extrusions but a lower sensitivity in identifying epidural (42%) and extravertebral (50%) leaks. Therefore, the CT scan overall was best in detecting location and accuracy. Conclusion CT detected more cement leaks than any of the other investigated techniques, especially epidural, extravertebral, and intravascular cement leakages. To achieve the best accuracy, only CT provides complete information.

scholarly journals The Importance of CT Pneumocolon in Detecting Colonic Lesions

2021 ◽  
Vol 21 (2) ◽  
pp. 76-82
Author(s):  
Saadoon Zghair Haidar Al –Yassen ◽  
◽  
Mansour Edan Dawood ◽  
Mustafa Abdulkareem Salman
Keyword(s):  
Computed Tomography ◽  
Colorectal Neoplasms ◽  
Sensitivity And Specificity ◽  
High Sensitivity ◽  
The Other ◽  
Colonic Carcinoma ◽  
Colorectal Carcinomas

Background: Colonic masses are clinically important because some of them are malignant and others have a tendency to become malignant such as polyps. CT pneumocolon may have a role in the evaluation and diagnosis of these masses. Objective: To determine the accuracy of computed tomography (CT) pmeumocolon in the detection of colonic masses compared with colonoscopy. Patients and Methods: A total of 60 patients with colorectal symptoms underwent evaluation for the presence of colorectal neoplasms by using both colonoscopy and CT pneumocolon and a comparison was made between them. Results: On colonoscopy, 10 out of 60 patients were having a negative colonoscopy. The results of colonoscopy of the other 50 patients were as follow; three out of fifty colonoscopies revealed invasive colorectal carcinomas in threse patients. The remaining 47 colonoscopies for 47 patients revealed benign polyps. The sizes of these polyps were as follows; (6 polyps were ˃1 cm in diameter), (17 polyps were 6-9 mm), and (24 polyps were ≤5 mm). CT pneumocolon detected all 3 malignant masses seen and biopsied by colonoscopy, but only (28 single polyps) which according to their size (4 polyps were ≥ 1cm), (11 polyps were 6-9 mm) and (13 polyps ≤5 mm), this gives CT pneumocolon a sensitivity of (63%), specificity of (70%) and accuracy (63%). Conclusion: CT pneumocolon has high sensitivity and specificity for a detection of large-sized masses, but not for small ones. CT pneumocolon may be suitable for investigating patients with symptomatic colorectal masses noninvasively. Keywords: Pneumocolon, colonoscopy, polyp, colonic carcinoma

THE PECULIARITIES OF CRIME PREVENTION BY OPERATIONAL UNITS IN PENAL INSTITUTIONS

2020 ◽  
pp. 27-32
Author(s):  
Ксения Ивановна Голубцова
Keyword(s):  
Crime Prevention ◽  
Complete Information ◽  
Current Situation ◽  
The Other ◽  
Correctional Institutions ◽  
Meaningful Information ◽  
Penal Institutions ◽  
The One ◽  
Negative Factors

Статья посвящена рассмотрению проблем профилактики преступлений оперативными подразделениями исправительных учреждений (далее - ИУ). Автор, раскрывая роль оперативных отделов ИУ в общей профилактике правонарушений, указывает на ее двоякость, поскольку, с одной стороны, рассматриваемые подразделения обладают значительным преимуществом перед другими службами учреждения в выявлении негативных факторов (негласный метод получения оперативно значимой информации), с другой стороны - далеко не все условия, которые способствуют совершению преступлений в ИУ, можно устранить оперативным путем. Изучение специальной литературы позволило выявить в деятельности начальников ИУ определенные проблемы, связанные с оценкой состояния оперативной обстановки в ИУ, сложившейся ситуации; с отсутствием прогноза развития криминогенной ситуации в ИУ, а также с профессиональной некомпетентностью руководителей, неумением объективно оценивать результаты деятельности структурных подразделений. Автор особое внимание уделяет анализу статистических данных о совершенных и предотвращенных преступлениях лицами, находящимися в местах лишения свободы. The article is devoted to the consideration of problems of crime prevention by operational units of correctional institutions (hereinafter referred to as IA). The author, revealing the role of the operational departments of the IA in the general prevention of offences, points to its twofold. On the one hand, the units under consideration have significant advantages over other services of the institution in identifying negative factors (these are tacit methods of obtaining promptly meaningful information). On the other hand, not all conditions conducive to the commission of crimes in IA can be eliminated by operational means: For example, shortcomings in the activities of other departments and services (security department, duty shift, etc.). The study of special literature has made it possible to identify problems in the activities of heads of correctional institutions in the sphere of implementation of solutions in case of lack of objective and complete information on the state of the operational situation in IA, the current situation, the results of the activities of structural subdivisions; No forecast of the development of the crime situation in IE; Professional incompetence of managers, inability to objectively assess the results of activities of structural subdivisions. The author pays particular attention to the analysis of statistics on crimes committed and prevented by persons in detention.

scholarly journals Are RNA-Based Tests Sufficient for COVID-19 Diagnosis? An Inspiration of Three Asymptomatic Cases

2021 ◽  
Vol 30 ◽  
pp. 096368972098545
Author(s):  
Tao Hu ◽  
Xiao Liu ◽  
Qinan Yin ◽  
Xingting Duan ◽  
Li Yan
Keyword(s):  
Computed Tomography ◽  
Nucleic Acid ◽  
Virus Infection ◽  
Severe Acute Respiratory Syndrome ◽  
The Other ◽  
Computed Tomography Scan ◽  
Health Authorities ◽  
History Of ◽  
Tomography Scan ◽  
Nucleic Acid Tests

In this work, we discovered a new phenomenon—asymptomatic COVID-19 infection, or covert case, during the pandemic. All the 3 patients had a history of exposure, with no symptoms, and no abnormalities were found in computed tomography scan or lab tests. Except for case 2, the other patients’ severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) nucleic acid tests were negative. But their anti-SARS-COV-2 nucleocapsid antibody showed a dynamic trend, consistent with the process of virus infection and clearance. A growing number of asymptomatic or covert cases need more attention. Lack of surveillance may lead to another outbreak. We hope to demonstrate our cases to attract the attention of governments or health authorities that covert cases should be the focus as well.

scholarly journals 60–700 K CTAT and PTAT Temperature Sensors with 4H-SiC Schottky Diodes

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 942
Author(s):  
Razvan Pascu ◽  
Gheorghe Pristavu ◽  
Gheorghe Brezeanu ◽  
Florin Draghici ◽  
Philippe Godignon ◽  
...  
Keyword(s):  
Low Cost ◽  
Schottky Diodes ◽  
Schottky Contact ◽  
High Sensitivity ◽  
Xrd Analysis ◽  
Absolute Temperature ◽  
Lower Sensitivity ◽  
Readout Circuit ◽  
Sensing Element ◽  
High Performing

A SiC Schottky dual-diode temperature-sensing element, suitable for both complementary variation of VF with absolute temperature (CTAT) and differential proportional to absolute temperature (PTAT) sensors, is demonstrated over 60–700 K, currently the widest range reported. The structure’s layout places the two identical diodes in close, symmetrical proximity. A stable and high-barrier Schottky contact based on Ni, annealed at 750 °C, is used. XRD analysis evinced the even distribution of Ni2Si over the entire Schottky contact area. Forward measurements in the 60–700 K range indicate nearly identical characteristics for the dual-diodes, with only minor inhomogeneity. Our parallel diode (p-diode) model is used to parameterize experimental curves and evaluate sensing performances over this far-reaching domain. High sensitivity, upwards of 2.32 mV/K, is obtained, with satisfactory linearity (R2 reaching 99.80%) for the CTAT sensor, even down to 60 K. The PTAT differential version boasts increased linearity, up to 99.95%. The lower sensitivity is, in this case, compensated by using a high-performing, low-cost readout circuit, leading to a peak 14.91 mV/K, without influencing linearity.

scholarly journals Vasitis: clinical and ultrasound confusion with inguinal hernia clarified by computed tomography

2013 ◽  
Vol 5 (4) ◽  
pp. 74
Author(s):  
Kathleen Eddy ◽  
Bruce Piercy ◽  
Richard Eddy
Keyword(s):  
Computed Tomography ◽  
Inguinal Hernia ◽  
Spermatic Cord ◽  
Vas Deferens ◽  
The Other ◽  
Other Hand ◽  
Ultrasound Computed Tomography ◽  
Ultrasound Findings ◽  
Duplex Doppler

Vasitis or inflammation of the vas deferens is a rarely describedcondition categorized by Chan & Schlegel1 as either generallyasymptomatic vasitis nodosa or the acutely painful infectious vasitis.Clinically, infectious vasitis presents with nonspecific symptomsof localized pain and swelling that can be confused with other,more common conditions such as epididymitis, orchitis, testiculartorsion, and inguinal hernia. Ultrasound with duplex Doppler scanningcan be used to exclude epididymitis, orchitis, and testiculartorsion. On the other hand, while inguinal hernia is difficult todifferentiate from vasitis using ultrasound, computed tomography(CT) is diagnostic. We describe 2 cases of vasitis with clinicaland ultrasound findings that initially were interpreted as inguinalhernias. In both patients, CT was diagnostic for vasitis showing anedematous spermatic cord and no hernia. Urine cultures in bothpatients were negative, but the symptoms resolved with antibiotictreatment.

Bulimia nervosa with co-morbid avoidant personality disorder: behavioural characteristics and serotonergic function

2004 ◽  
Vol 34 (1) ◽  
pp. 113-124 ◽  
Author(s):  
K. R. BRUCE ◽  
H. STEIGER ◽  
N. M. KOERNER ◽  
M. ISRAEL ◽  
S. N. YOUNG
Keyword(s):  
Personality Disorder ◽  
Bulimia Nervosa ◽  
The Other ◽  
Self Report ◽  
Lower Sensitivity ◽  
Social Avoidance ◽  
Behavioural Inhibition ◽  
Avoidant Personality Disorder ◽  
Affective Instability ◽  
The Impact

Background. Separate lines of research link lowered serotonin tone to interpersonal submissiveness and bulimia nervosa (BN). We explored the impact of co-morbid avoidant personality disorder (APD), as a proxy for submissiveness, on behavioural inhibition and serotonin function in women with BN.Method. Participants included women with BN with co-morbid APD (BNA+, N=13); women with BN but without APD (BNA−, N=23), and control women with neither BN nor APD (N=23). The women were assessed for psychopathological tendencies and eating disorder symptoms, and participated in a computerized laboratory task that measured behavioural inhibition and disinhibition. Participants also provided blood samples for measurement of serial prolactin responses following oral administration of the partial 5-HT agonist meta-chlorophenylpiperazine (m-CPP).Results. The BNA+ group had higher scores than the other groups on self-report measures of submissiveness, social avoidance, restricted emotional expression, affective instability and self-harming behaviours. Compared with the other groups, the BNA+ group tended to be more inhibited under cues for punishment on the computerized task and to have blunted prolactin response following m-CPP. The bulimic groups did not differ from each other on current eating symptoms or on frequencies of other mental disorders.Conclusions. Findings indicate that women with BN and co-morbid APD may be characterized by interpersonal submissiveness and avoidance, affective instability, self-harm, behavioural inhibition in response to threat and lower sensitivity to serotonergic activation. These findings may indicate common, serotonergic factors, associated with social submissiveness, behavioural inhibition to threat and BN.

Spinal Epidural Compression Secondary to Osteoblastic Metastatic Vertebral Expansion

Neurosurgery ◽  
1988 ◽  
Vol 23 (5) ◽  
pp. 662-665 ◽  
Author(s):  
Alan Hirschfeld ◽  
William Beutler ◽  
Juliet Seigle ◽  
Herbert Manz
Keyword(s):  
Computed Tomography ◽  
Radiation Therapy ◽  
Spinal Canal ◽  
Surgical Decompression ◽  
The Other ◽  
Precise Nature ◽  
Osteoblastic Metastasis ◽  
Neurological Improvement ◽  
Epidural Compression ◽  
Spinal Epidural

Abstract We present two cases in which spinal epidural compression was caused by the expansion of bony elements into the spinal canal as a result of osteoblastic metastases. The precise nature of the compression was appreciated only on computed tomography. One patient had immediate and sustained neurological improvement after laminectomy. The other benefited temporarily, but widespread involvement of his spine ultimately led to paraplegia despite two more decompressive procedures. We think that bony expansion of the spine secondary to osteoblastic metastasis is not reversible with radiation therapy alone and is, therefore, an absolute indication for surgical decompression.

SPECT Scan in Somatization Disorder Patients: An Exploratory Study of Eleven Cases

2001 ◽  
Vol 35 (3) ◽  
pp. 359-363 ◽  
Author(s):  
Javier Garcia-Campayo ◽  
Concepcion Sanz-Carrillo ◽  
Teresa Baringo ◽  
Concepción Ceballos
Keyword(s):  
Computed Tomography ◽  
Single Photon ◽  
Photon Emission ◽  
Spect Imaging ◽  
The Other ◽  
University Hospital ◽  
Somatization Disorder ◽  
Emission Computed Tomography ◽  
Axis I ◽  
Pain Symptoms

Objective: There are no previous studies using single photon emission computed tomography (SPECT) scans in somatization disorder (SD) patients. The aim of this paper is to assess SPECT imaging abnormalities in SD patients and study any relation to laterality. Method: Eleven SD patients from the Somatization Disorder Unit of Miguel Servet University Hospital, Zaragoza, Spain, not fulfilling criteria for any other psychiatric disorder and showing normal computed tomography (CT) and magnetic resonance imaging (MRI) images were studied with SPECT. Patients with DSM-IV axis I comorbidity were ruled out because it has been demonstrated that SPECT scans can show abnormalities in patients with depression and anxiety disorders. The technique used for SPECT was 99mTc-D,1,hexamethylpropyleneamide- oxime (99mTc-HMPAO) in four patients and 99mTc-bicisate in the other seven. The SPECT scans were evaluated without knowledge of clinical data and entirely by visual inspection. Results: Seven out of 11 (63.6%) SD patients showed hypoperfusion in SPECT imaging. In four cases there was hypoperfusion in the non-dominant hemisphere and the predominance of pain symptoms took place in the contralateral hemibody. In the other three patients hypoperfusion was bilateral. The anatomical regions affected were cerebellum (four cases), frontal and prefrontal areas (three cases), temporoparietal areas (two cases) and the complete hemisphere (one case). Conclusions: A proportion of SD patients may present hypoperfusion in SPECT images, uni- or bilaterally, in different brain areas. Possible aetiological explanations for this finding are discussed. Controlled studies are necessary to confirm or refute this hypothesis.

TOWARDS SENSING SINGLE OR A FEW BIO-MOLECULAR ARCHITECTURES: DESIGN OF FUNCTIONAL SURFACES

2008 ◽  
Vol 18 (01) ◽  
pp. 187-194
Author(s):  
PEIJI ZHAO ◽  
DWIGHT WOOLARD ◽  
JORGE M. SEMINARIO ◽  
ROBERT TREW
Keyword(s):  
Density Functional ◽  
High Sensitivity ◽  
Lower Sensitivity ◽  
Label Free ◽  
Dna Molecules ◽  
Surface Attachment ◽  
Biomolecular Sensing ◽  
Aromatic Molecules ◽  
Electrical Sensing ◽  
Silicon Based

There is considerable interest in electrical sensing of biomolecular binding since it has the potential to be label free, to work easily in aqueous environments native to the biomolecules, and to be integrated with small, fast, and inexpensive microelectronoics as detection instrumentation. Although electrochemical methods have been used successfully in detections of DNA molecules with Ag labels at very high sensitivity (~ p ml), detection of DNA molecules in terms of label free techniques has a lower sensitivity (~ μ ml). Here, the surface attachment chemistry is critical towards the detection of ultra-low concentration of biomolecules. In this article, based on density functional theory, we have calculated and analyzed the electrical characteristics of the contact between aromatic molecules and silicon (100) − 2×1 surfaces. Design principles for silicon based electrodes of electrochemically biomolecular sensing instruments for label-free sensing of single or a few biomolecular molecules have also been discussed.

Sign in / Sign up

Export Citation Format

Share Document