Sensitivity Of Ultrasonography In Diagnosis Research Articles

Evaluation of Diagnostic Accuracy of Ultrasonography and Low Dose Computed Tomography in Acute Appendicitis

In acute appendicitis, abdominal Ultrasonography (USG) to reach a stable diagnosis and use of Low DoseComputed Tomography (LDCT) in the diagnosis of acute appendicitis is crucial. This study aimed atassessing of the accuracy of imaging modalities (USG and LDCT) in the diagnosis of children and adultswith acute appendicitis to minimize the rate of negative appendectomyA total of 42 patients, children andadults were examined, were included in this research (16 females and 26 males) ages was ranged from 5 to45 years. All patients were examined byUSG and LDCT to diagnosis acute appendicitis . The sensitivityof low dose a LDCT scan was used to diagnose acute appendicitis (96.0%) that means LDCT was able todiagnosed (96.0%) Correctly diagnose acute appendicitis patients. The specificity of LDCT in the diagnosisof acute appendicitis was (50.0%) that mean LDCT was able to diagnosed half of those with diagnosis otherthan acute appendicitis correctly, But the sensitivity of USG in diagnosis of acute appendicitis was (54.1%)that mean ultrasound was able to diagnosed (54.1%) of patients diagnosed by CT scan as acute appendicitiscorrectly.The use of low-dose computerized tomography (LDCT) provides significantly higher diagnosticaccuracy compared to ultrasound for the detection of acute appendicitis.

Optical sonography in differential diagnosis of thyroid nodes

Objective To develop a non-invasive method for differential diagnosis of thyroid nodes. Material and methods Optical sonography was made in 623 patients with thyroid nodes including 374 women (60%) and 249 men (40%) aged 19-79 years (mean 64±15 years). All patients underwent ultrasound-assisted fine-needle aspiration biopsy. Cytological examination revealed cystic colloidal goiter (CCG) in 317 (51%) cases, follicular adenoma (FA) - in 197 (31.5%) cases, thyroid cancer - in 109 (17.5%) cases. All patients underwent surgery. Histological examination verified cystic colloidal goiter in 354 (56.8%) cases, follicular adenoma - 75 (12.0%) cases, thyroid cancer - 194 (31.2%) cases. Follicular cancer was diagnosed in 120 cases, papillary cancer - 70 cases, undifferentiated cancer - 4 cases. Results and conclusion Sensitivity, specificity and accuracy of optical ultrasonography in differential diagnosis of thyroid nodules were estimated. Sensitivity of ultrasonography in the diagnosis of thyroid malignancies was 0.75, specificity 0.62, accuracy 0.67. Sensitivity of ultrasonography in the diagnosis of thyroid adenoma was 0.85, specificity 0.62, accuracy 0.73. Sensitivity of optical sonography in the diagnosis of CCH was 0.62, specificity 0.61, accuracy 0.7. Optical sonography ensures differentiation of CCH and follicular adenoma, CCH and thyroid cancer, follicular adenoma and thyroid cancer. Sensitivity, specificity and accuracy of ultrasonography in differential diagnosis of FA and thyroid cancer are 0.85, 0.62, 0.73 and 0.8, 0.71, 0.7, respectively.

Der Peritonsillarabszeß im Ultraschallbild*

A prospective study was carried out to evaluate the sensitivity of ultrasonography in diagnosis of peritonsillar abscess (Quinsy). In 1986 through 1989 all cases of doubtful peritonsillitis were subjected to B-mode ultrasonography of tonsils before tonsillectomy was carried out. 36 patients were included in this clinical study. In cases of clinically uncertain peritonsillar abscesses the sensitivity of the method was 82%. However, only four false positive cases ("abscess in the scan but no pus during surgery") occurred.