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M Memarsadeghi

Publications and source records attributed to M Memarsadeghi.

9 recordsLinked to original sources
PubMed2005

[MR urography: principles, examination techniques, indications].

MR urography is an evolving and promising technique in the evaluation of the urinary tract. MR urography is currently considered the method of choice for imaging of the renal parenchyma and the collecting systems in patients who cannot undergo routine radiographic studies such as pregnant women, pediatric patients, patients allergic to iodinated contrast agents, or patients with impaired renal function. The future development of MR urography in terms of functional, cellular, and molecular imaging is presently the subject of research. The ability of MR imaging to provide quantitative functional information (e.g., on blood flow, perfusion, glomerular filtration rate, and excretion as well as urine drainage) in addition to morphologic assessment of the parenchyma and the collecting system could lead to a single, "all-in-one approach" examination technique.

Humans↗
PubMed2005

[Virtual multislice computed tomography cystoscopy for evaluation of urinary bladder lesions].

The introduction of multislice computed tomography (MDCT) with the possibility of acquiring isotropic datasets has been an ideal prerequisite for development of virtual MDCT cystoscopy. Remarkable technical progress regarding post-processing of high-resolution 3D datasets as well as a considerable reduction of the time required for post-processing made it possible to introduce virtual MDCT cystoscopy into the clinical routine. 3D post-processing that often required 7-8 h when virtual endoscopy techniques were first developed can now be performed in less than 5 min after transfer of data to the 3D workstation. With the limitations and contraindications of conventional cystoscopy in mind, virtual MDCT cystoscopy may be seen as a valuable alternative to conventional cystoscopy for evaluation of hematuria.

Cystoscopy↗
PubMed2003

[Value of 14-gauge ultrasound-guided large-core needle biopsy of breast lesions: own results in comparison with the literature].

PURPOSE: To report the false-negative rate, sensitivity, and specificity of 14-gauge ultrasound-guided large-core needle biopsy (14-G USSB) performed on breast lesions at our institution and, furthermore, to compare and discuss our own results with those reported in the literature. MATERIALS AND METHODS: This study includes 399 lesions examined by 14-G USSB. The results of the 14-G USSB were compared with the results of the surgical biopsy or, in cases of benign histology, were followed clinically. A key word search in two medical databases was undertaken to compare our data with those reported in the literature. The search was limited to the period from January 1990 to February 2002 and only original investigations published in English and German were included in our comparison. RESULTS: At our institution, 238 (59.6 %) benign and 161 (40.4 %) malignant lesions were diagnosed by 14-G USSB. The 14-G USSB was false-negative in 5 (1.25 %) of 399 cases. It has a sensitivity of 95.7 %, and specificity 100%. The literature reports false-negative rates between 0 % and 1.26 %, sensitivities between 86% and 100%, and specificities between 99.7 % and 100 %. On the basis of 3880 results from seven selected original papers and our own study, the false-negative rate for 14-G USSB was calculated to be 0.4 % (16 of 3880). CONCLUSION: Based on our results and those reported in the literature, 14-G USSB can be considered safe and reliable in the assessment of breast lesions.

Adult↗
PubMed2002

[Stereotactic needle breast biopsy: Diagnostic reliability of various biopsy systems and needle sizes].

OBJECTIVES: To compare quality of harvested tissue, false-negative rate, and complication rate of large-core needle breast biopsy (LCNBB) and directional, vacuum-assisted breast biopsy (DVABB) in non-palpable breast lesions. PATIENTS AND METHODS: From 1994 to 1999, in 580 non-palpable breast lesions a stereotactically-guided breast biopsy was performed. 14-G LCNBB was used in 168 lesions (29 %). DVABB was used in 412 lesions (71 %; 11-G DVABB: 134 lesions 32.5 %, 14-G DVABB: 278 lesions 67.5 %). Following biopsy, patients underwent either surgical excision (n = 533; 93.8 %) or mammographical follow-up (n = 36; 6.2 %). Histological results of LCNBB, DVABB, surgical breast biopsy and follow-up results were compared and scored for their tissue quality on a three-point scale (1 = disagreement between biopsy and surgery; 2 = partial agreement; 3 = complete agreement). In addition, we determined the false negative and complication rate for both systems. RESULTS: Histological examination after surgery and follow-up proved 262 (45.2 %) to be benign, 15 (2.6 %) to be high-risk lesions and 303 (52.5 %) to be malignant. In the tissue quality there was no significant difference between 14-G LCNBB (score = 2.94), 11-G DVABB (score = 2.92) and 14-G DVABB (score = 2.91) (p > 0.05). Particularly, in calcifications 11-G DVABB scored better (score = 2.92) than 14-G DVABB (score = 2.88) (p > 0.05). 14-G LCNBB had a lower false negative rate (1.8 %) than 11-G DVABB (3 %) and 14-G DVABB (3.2 %) (p > 0.05). There was no difference in the complication rate between the different needle types. CONCLUSIONS: Our results indicate that both LCNBB and DVABB are reliable and safe techniques in the diagnosis of non-palpable breast lesions. However, the use of 14-G LCNBB seems to be advantageous in masses, the use of 11-G DVABB seems to be advantageous in asymmetric densities and calcifications.

Adult↗
PubMed2002

[Comparison of wire versus carbon localization of non-palpable breast lesions].

PURPOSE: To compare the accuracy of wire and carbon localization in stereotactically localized open breast biopsy. PATIENTS AND METHODS: From June 1995 to December 1997, a total of 725 stereotactic wire or carbon dye localizations were performed in 698 female patients. Success of localization was evaluated either by a malignant histopathological diagnosis or by mammographic follow-up. A lesion was considered to be missed if it could be still seen on follow-up mammography. RESULTS: In 703 of 725 cases, the success of localization could be evaluated with 427 (61 %) lesions localized with a wire and 276 (39 %) with carbon. Seven (1 %) out of 703 lesions were missed at open biopsy. Three lesions of these had been localized with wire and three lesions with carbon. The miss rates were 0.9 % and 1.1 %, respectively (p = 1.0). CONCLUSION: Both wire and carbon localization are reliable and accurate in the localization of non-palpable breast lesions. Concerning efficiency and costs, carbon dye seems to offer a promising compromise.

Adult↗
PubMed2002

Videofluoroscopy of deglutition in children after repair of esophageal atresia.

PURPOSE: To evaluate the functional disorders of the oral and pharyngeal phases of deglutition after repair of esophageal atresia in children. MATERIAL AND METHODS: 19 children (10 girls, 9 boys, mean age 22 months) underwent videofluoroscopy of deglutition after repair of esophageal atresia. The videofluoroscopic studies were assessed according to functional and morphological changes in the oral, pharyngeal and esophageal phases. The persistence of radiologic findings on videofluoroscopy was determined. RESULTS: The oral phase was normal in all patients. The main functional disorder of the pharyngeal phase was aspiration in 7 (37%) children. A completely normal deglutition in the pharyngeal and esophageal phases was not seen in any patient. CONCLUSION: Videofluoroscopy after repair of esophageal atresia is helpful in differentiation of functional and morphological disorders that can lead to prandial aspiration and have an influence on the decision about continued therapy.

Deglutition Disorders↗
PubMed1999

[Staging of carcinomas of the upper gastrointestinal tract. The current status of diagnostic imaging].

Esophageal carcinoma: CT and endosonography are complementary and the most important imaging modalities at present for staging. After endoscopic and histological diagnosis, CT of the thorax and the abdomen is used. With the proof of local infiltration of a neighbouring organ or in the presence of distant metastasis, palliative therapy can be started. If CT is not conclusive or no local infiltration or distant metastasis is proven, endosonography should be performed. Gastric carcinoma: At present endosonography shows the highest accuracy for diagnosis of the T stage. For differentiation between T3 and T4 tumors the accuracy of CT is not sufficient to predict resectability. The N stage can be determined at present by no modality with sufficient accuracy. Distant metastasis can be diagnosed by CT with high sensitivity and specificity. Small bowel carcinoma: These rare tumors are diagnosed with high accuracy by enteroclysis, whereby the diagnosis takes place at a late stage due to the nonspecific clinical findings.

Diagnostic Imaging↗
PubMed1997

[Sitting or supine stereotaxic core biopsy of the breast? A comparison based on a randomized, prospective study].

UNLABELLED: OBJECTIVE/MATERIAL AND METHODS: In a prospective randomized study, the techniques of stereotactic breast biopsies in prone and sitting position were compared. Part of the data has already been published. A total of 103 women underwent stereotactic breast biopsies, either prone (n = 51; using TRC-Mammotest, Sweden) or in the sitting position (n = 52; using Stereotix 2, General Electric Medical Systems, Milwaukee, Wisconsin, USA). With the help of pre- and post-biopsy questionnaires, anxiety, pain, and subjective experience were recorded in all patients. Vasovagal reactions were scored from 0 to 2 according to their severity. All biopsy results were verified by surgery. The specificities and sensitivities for the two positions were calculated and statistically compared. RESULTS: With regard to overall tolerance no statistically significant difference between biopsies performed in the sitting or the prone position was noted. Significantly more patients (p = 0.04) in the prone position stated they would prefer premedication prior to a repeat biopsy. Three patients (prone; n = 1; sitting; n = 2) fainted during the procedure. There was no statistically significant difference between the two biopsy positions regarding sensitivity (95%) and specificity (100%). CONCLUSIONS: More attention should be paid to patient care and, especially, preintervention information. Biopsies in the prone or sitting position are equally well tolerated. Somatic reactions are not a major problem during breast biopsy. Success and validity are independent of the biopsy position.

Adult↗