Spiral CT In Patients Research Articles

Retraction Note: Diagnostic value of abdominal X-ray film and multi-slice spiral CT in patients with acute intestinal obstruction by using optical medical equipment

Retraction Note: Diagnostic value of abdominal X-ray film and multi-slice spiral CT in patients with acute intestinal obstruction by using optical medical equipment

Diagnostic value of abdominal X-ray film and multi-slice spiral CT in patients with acute intestinal obstruction by using optical medical equipment

Diagnostic value of abdominal X-ray film and multi-slice spiral CT in patients with acute intestinal obstruction by using optical medical equipment

Diagnostic Value of Multi-slice Spiral CT in Patients with Retroperitoneal Neurogenic Tumor

Diagnostic Value of Multi-slice Spiral CT in Patients with Retroperitoneal Neurogenic Tumor

Diagnostic Study of 64 Slice Spiral CT in Patients with Acute Thoracic and Abdominal Trauma

Diagnostic Study of 64 Slice Spiral CT in Patients with Acute Thoracic and Abdominal Trauma

Diagnostic value of dual-source spiral CT in patients with diabetic lower limb arteriosclerosis obliterans.

Diagnostic value of dual-source spiral CT in patients with diabetic lower limb arteriosclerosis obliterans.

ROLE OF CT SCAN IN DIAGNOSIS OF ACUTE APPENDICITIS

Background: To evaluate the diagnostic accuracy of the spiral-CT in patients with clinically suspected acute appendicitis.
 Methods: Appendiceal spiral-CT was performed in 50 patients (21 women and 29 men) with clinically suspected acute appendicitis. Scans were obtained from the L4 level to the symphysis pubis using 5 mm collimation without i.v., oral, or rectal contrast material. Prospective diagnoses based on CT findings were compared with histopathological results
 Results: In our study appendix diameter test sensitivity was 97.56%, specificity was 77.78 %, positive predictive value was 95.27%, negative predictive value was 87.50% and diagnostic accuracy was 94.00%.
 Conclusion: The accuracy of computed tomography in diagnosing acute appendicitis was high. The results emphasize the role of computed tomography as an accurate modality in daily routine diagnostics for acute appendicitis in all clinical emergency settings.
 Key words: Appendicitis, CT scan, Accuracy.

Evaluation of plaque texture by 256-slice spiral CT in patients with acute coronary syndrome

ObjectiveTo evaluate the primary clinical value of 256-slice spiral CT (MSCT) in detecting the plaque texture in the patients with acute coronary syndrome (ACS).MethodsEighty five patients, 49 ACS, 36 non-ACS...

E0436 Clinical Study on Relationship between the Plasma LTB4 levels and Unstable plaque in Acute Coronary Syndrome

ObjectiveTo explore the association between plasma Leukotriene B4 (LT-B4) and the severity of coronary artery lesions in coronary heart disease (CHD) patients.Methods400 patients were divided into CHD group (n=310) and...

CT manifestations of patients with swine-origin influenza A H1N1 QI

Objective To explore the manifestations of chest multi-slice spiral CT in patients with initial infection of swine-origin influenza A (H1N1) virus (S-OIV). Methods The chest multi-slices spirals CT images of 19 firstly diagnosed patients with swine-origin influenza A (H1N1) in our institution were retrospectively studied. CT manifestations were evaluated by three experienced radiologists. Location, appearance of lung abnormalities, abnormal distribution, pleural effusion and others (pericadiaum, lymphadenopathy and pleural thickening) were observed and quantitatively analyzed. The correlation of ground-glass and consolidation CT scores with the fever time was studied. Results The abnormal CT findings were observed bilaterally in 18 of 19 subjects including ground-glass (n= 3), consolidation (n=3 ), consolidation accompanied with ground-glass (n=12). Most of these lesions were distributed diffusively (n=14) while the others located in the middle and low lobes (n= 4). Unilateral (n=3) or bilateral (n=2) pleural effusion were observed. Lymphadenopathy (n=2), effusion of pericadium (n=1), pleural thickening (n=1) and cardiac enlargement (n=2) were also found in patients with H1N1. CT scores of ground-glass were 4. 25(n=2),3.75 (n=1),2.25(n=1),1.75(n=1),1.00(n=6),0.75(n=2), 0.50(n=2),0(n=4).CT scores of consolidation were4.25(n=1),4.00(n=1),3.75 (n=1), 2.75(n=1),1.25(n=3),1.00(n=2),0.75(n=2),0.50(n=1),0.25(n=3),0(n=4). CT scores of ground-glass were significantly correlated with the fever time (r= 0.776, P 0.01). Conclusions The most common CT findings in patients with S-OIV infection are diffuse distribution of bilateral ground-glass opacities with or without associated focal or multifocal areas of consolidation. The increasing of ground-glass's range could be the marker of progression of H1N1 pulmonary infection at initial stage. Key words: Influenza,human; Pneumonia,viral; Tomography, X-ray computed

Change in treatment as result of FDG-PET and CT in clinically stage III melanoma patients: A prospective study in 221 patients

9069 Background: An important part in the treatment planning for metastatic melanoma is an evaluation of the presence or absence of distant melanoma metastases. However, melanoma has the well-known feature to spread to unusual sites and the presence of multiple metastases is usually a contraindication for surgery. The aim of this study was to assess how treatment changed as result of the FDG-PET and spiral CT in patients clinically stage III melanoma. Methods: All consecutive patients older than 18 years with palpable, histology/cytology proven lymph node metastases of melanoma referred to the five participating hospitals between July 2003 and July 2007 for examination with FDG-PET and CT were prospectively included in this study. All patients were considered candidates for further surgical intervention in the form of a regional lymph node dissection. Performed treatment was recorded to define a change in treatment plan. Results: Overall, 221 patients were included in the five hospitals. More than half the patients were male, median age was 57.9 (range 23.2–93.1) years. The primary melanoma was mostly located on the lower extremities (35.6%) or trunk (35.6%). PET and CT were comparable in detecting liver and abdominal metastases, CT detected more lung metastases and PET detected more bone and skin metastases. Treatment changed in 41 patients (18.6%), mostly as result of both scans (n=34), or PET alone (n=5) or CT alone (n=2). In 28 patients treatment changed to chemotherapy, 6 patients received a superficial lymph node dissection for local control while 3 patients received two lymph node dissections as result of other lymph node metastases that were detected. Conclusions: In conclusion, treatment changed in 19% of the melanoma patients with palpable lymph node metastases, mostly as result of both scans. The identification of metastatic disease did not always change the clinical management of the patients. The PET scan, with the CT scan as a good alternative are indicated in staging of melanoma patients with palpable lymph node metastases. No significant financial relationships to disclose.

Evaluation of axillary lymph nodes metastasis with spiral CT in patients with breast cancer

目的 探讨乳腺癌腋窝淋巴结转移的CT特征.方法乳腺疾病患者38例,其中乳腺癌患者23例,良性病变患者15例.采用双排探测器螺旋CT机平扫及增强扫描检查腋窝淋巴结,观察乳腺癌淋巴结转移与淋巴结大小及其内部结构的关系,同时与病理结果对照.结果共检查腋窝淋巴结56枚,其中转移性淋巴结29枚,非转移性淋巴结27枚.长径>10 mm的44枚淋巴结中,转移性和非转移性淋巴结各22枚;短径>5 mm的49枚淋巴结中,转移性淋巴结25枚,非转移性淋巴结24枚;21枚转移性淋巴结发生实变,仅1枚非转移性淋巴结发生实变;门结构存在的8枚转移性淋巴结中,7枚实质厚度不均匀,门结构存在的26枚非转移性淋巴结中,2枚实质厚度不均匀.结论乳腺癌腋窝淋巴结转移主要表现为淋巴结结构的改变,与其长径和短径的相关性较差;当腋窝淋巴结发生实变、实质厚度不均、肿大淋巴结出现边缘模糊或临近脂肪混浊时,可疑为转移性淋巴结.螺旋CT对判断乳腺癌腋窝淋巴结转移有明显优势。

Does iodine concentration affect the diagnostic efficacy of biphasic spiral CT in patients with hepatocellular carcinoma?

We investigated the effect of iodinated contrast medium concentration on increased neoplastic lesion enhancement and its direct relation to diagnostic efficacy in biphasic spiral computed tomography for detection of hepatocellular carcinoma. A pilot, single-center, randomized, double-blind, crossover, comparative study was performed and included 22 participants. Each patient underwent two separate biphasic contrast-enhanced spiral computed tomographic examinations. Scans were performed with iomeprol containing 400 (iomeprol 400) or 300 (iomeprol 300) mg of iodine per milliliter (Iomeron, Bracco Imaging SpA, Milan, Italy) with a 2- to 12-day window scan; patients were given an equal total dose of 45 g of iodine at a fixed injection rate of 4 mL/s. Comparison included assessment of quantitative and qualitative parameters. Lesion density and lesion-to-liver contrast increased more markedly with the higher concentration of contrast medium during the arterial phase (p = 0.0016 and 0.0005, respectively). There was no significant difference in any parameter between the two concentrations during the portal phase. Number of lesions detected during the arterial phase increased from 37 with iomeprol 300 to 42 with iomeprol 400; in the portal phase, the respective numbers were 34 and 36. Even though a small number of patients was examined, our study suggests that, in patients with cirrhosis, an increased concentration of iodine improves liver-to-lesion contrast and may improve the detection of hepatocellular carcinoma.

Value of spiral CT in patients with cricothyroid approximation.

Cricothyroid approximation raises the vocal pitch by simulating contraction of the cricothyroid muscle with sutures. The aim of this study was to determine the role of spiral CT in patients scheduled for cricothyroid approximation. 29 transsexual patients were examined with spiral CT prior to and after laryngoplastic surgery. CT findings were correlated with phonographic findings in all patients. The average reduction of the cricothyroid distance was 6 mm (range 2-10 mm). Vocal pitch elevation was greatest in patients with the largest reduction of the cricothyroid distance. CT accurately determines the cricothyroid distance prior to and after surgery and is an ideal method for follow-up, especially in post-operative reversion towards a lower pitch. In addition, CT provides important data in determining the most appropriate extent and site of intracordal intervention to achieve a desired pitch elevation.

71. The role of spiral CT in patients with intermediate probability V/Q scans: Can spiral CT replace pulmonary angiography?

s: Abstracts of the 30th Annual Scientific Meeting of the Australian and New Zealand Society of Nuclear Medicine

Virtual Endoscopy Using Spiral CT in Patients with Carcinomas of the Hypopharynx and Larynx

Purpose: To compare the usefulness of virtual endoscopy using spiral CT with that of laryngoscopy in the detection and evaluation of laryngeal and pharyngeal carcinomas. Materials and Methods: Twenty-four patients with pathologically proven laryngeal and pharyngeal carcinomas underwent laryngoscopy and virtual endoscopy using spiral CT. Eleven of the carcinomas were supraglottic, five were glottic, and eight were hypopharyngeal. Source images obtained by spiral CT were transmitted to an independent workstation and virtual endoscopic images were obtained using Navigator software. These were graded according to their quality (good, fair, bad), and were interpreted by two radiologists who were blinded to the conventional endoscopic findings. These latter were subsequently compared with the virtual endoscopic findings in terms of similarity to laryngoscopic examination and detectability of lesions. Results: The overall image quality of virtual endoscopy was good in 16 cases (67%), fair in eight (33%), and bad in no case. Among the 11 supraglottic carcinomas, image quality was good in seven cases (64%), and fair in four (36%). In four of the five glottic carcinomas (80%) quality was good, and in one case (20%) it was fair, while among the eight hypopharyngeal carcinomas, quality was good in five cases (63%), and fair in three (37%). Overall, detection of the lesion was possible in 23 cases (96%). Due to the small size of the lesion, the Conclusion: Virtual endoscopy using spiral CT is a safe and noninvasive method, and also successfully detects laryngeal and pharygenal lesions, with good image quality. For the evaluation of laryngeal and hypopharyngeal carcinoma, its use may complement that of axial CT.

An evaluation of the clinical predictors for the presence of ureteral calculi on spiral CT in patients with suspected renal colic

An evaluation of the clinical predictors for the presence of ureteral calculi on spiral CT in patients with suspected renal colic

Acute appendicitis in non-contrast spiral CT: a diagnostic luxury or benefit?

To evaluate the diagnostic accuracy of thin collimated unenhanced spiral-CT in patients with clinically suspected acute appendicitis and to determine the impact on patient management and overall costs. Unenhanced focussed appendiceal spiral-CT was performed in 56 patients (23 women and 33 men) with clinically suspected acute appendicitis. Scans were obtained from the L4 level to the symphysis pubis using 5 mm collimation, 7.5 mm table feed (pitch 1.5) and 4 mm increment without i.v., oral, or rectal contrast material. Prospective diagnoses based on CT findings were compared with surgical (and histopathological) results and clinical follow-up. The effect of spiral-CT on patient management and clinical resources was assessed. 29 patients (10 women and 19 men) underwent appendectomy. Unenhanced spiral-CT was an accurate imaging technique for the initial examination of patients with suspected acute appendicitis with a sensitivity of 95.4% and a specificity 100%, an accuracy of 98.2%, a positive predictive value of 100%, and a negative predictive value of 97.1%. In 27 patients with no evidence of acute appendicitis, an alternative diagnosis could be made in 24 patients by unenhanced spiral-CT. Unenhanced spiral-CT is an accurate test to diagnose or to exclude acute appendicitis. Routine appendiceal spiral-CT can improve medical care and reduce the overall costs for patients suspected of having acute appendicitis.

CT Findings of Increased Attenuation of the Liver Adjacent to the Hemangioma

Purpose : The purpose of this study was to evaluate the frequency, location, and appearance of increasedattenuation of the liver adjacent to a mass during arterial-phase spiral CT in patients with hemangioma. Thecharacteristics of the mass associated with these findings were also evaluated. Materials and Methods: Usingspiral CT, 153 lesions in 114 hepatic hemangioma patients were retrospectively reviewed. We evaluated thefrequency, location, and appearance of increased hepatic attenuation adjacent to the hemangioma, and determinedwhether lesion size varied according to whether or not there was increased hepatic attenuation. Results : Areas ofincreased hepatic attenuation adjacent to the hemangioma were identified in 10.5% of cas-es(16/153) and seen inmasses which showed a homogeneously hyperdense (11/16, 69%) or peripherally hy-perdense pattern (5/16, 31%). Thelocation of increased hepatic attenuation was commonly the peripheral por-tion (9/16, 56%), and increased hepaticattenuation was frequently wedge shaped of the mass (11/16, 69%). Lesion size did not vary according to whether ornot there was increased hepatic attenuation. Conclusion : Increased hepatic attenuation adjacent to a hemangiomais not rare, and is usually located periph-eral to the mass. It is common in a mass showing a homogeneouslyhyperdense pattern.

Comparison between conventional and spiral CT in patients with hypervascular hepatocellular carcinoma

To determine the usefulness of spiral CT in the detection of hypervascular hepatic lesions, we compared conventional contrast enhanced CT (CECT) with whole liver dynamic scanning during the artery-dominant phase by spiral CT (SDCT), using hypervascular hepatocellular carcinoma (HCC) as a model. Twenty-nine patients with 56 hypervascular nodular type HCCs detected by hepatic digital subtraction angiography were examined by both CT techniques. These nodular type HCCs were divided into three groups according to diameter: <10 mm ( n = 7), 10–20 mm ( n = 17), and over 20 mm ( n = 32). None of seven lesions less than 10 mm in diameter was seen by either technique. Of 17 lesions 10–20 mm in diameter, four (24%) were detected by precontrast CT plus CECT, whereas 14 (82%) were detected by precontrast CT plus SDCT. There were no lesions detected by CECT only, whereas 10 lesions were detected by SDCT only ( P < 0.01 by signed test). For 32 lesions over 20 mm in diameter, there was no significant difference in detection rates between the CT techniques. Our results indicate that spiral CT is useful for the detection of relatively small hypervascular hepatic lesions such as hypervascular HCCs.