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Na voljo sta dva načina iskanja: enostavno in napredno. Enostavno iskanje lahko zajema niz več besed iz naslova, povzetka, ključnih besed, celotnega besedila in avtorja, zaenkrat pa ne omogoča uporabe operatorjev iskanja. Napredno iskanje omogoča omejevanje števila rezultatov iskanja z vnosom iskalnih pojmov različnih kategorij v iskalna okna in uporabo logičnih operatorjev (IN, ALI ter IN NE). V rezultatih iskanja se izpišejo krajši zapisi podatkov o gradivu, ki vsebujejo različne povezave, ki omogočajo vpogled v podroben opis gradiva (povezava iz naslova) ali sprožijo novo iskanje (po avtorjih ali ključnih besedah).

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1161 - 1170 / 2000
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1161.
Hydrocolonic sonography in the detection of large bowel disease
Dubravka Vidmar, 2000, izvirni znanstveni članek

Povzetek: Background. The presence of fluid in the bowel lumen improves the sonographic visualisation of the gastrointestinal tract, thus permitting earlier and more accurate detection of pathological changes. Hydrocolonic sonographic (HS) is amethod of examination the colon after it has been cleaned and filled with water. Patients and methods. We have evaluated the method in a group of 56 patients by comparing its results with the findings of colonoscopy, double-contrast barium enema or surgery. Results. HS had an overall accuracy of 86%, a sensitivity of 81%, a specificity of 92%, a positive predictive value of 91% and a negative predictive value of 82%. Conclusions. The technique is not suitable for examination the rectum, but apart from that it is comparable in usefulness to double-contrast barium enema. The main limitation of HS is that it requires a lot of experience and skill on the partof the sonologist, which affects its acceptability for diagnostic evaluation of the colon.
Objavljeno v DiRROS: 24.01.2024; Ogledov: 273; Prenosov: 57
.pdf Celotno besedilo (598,29 KB)

1162.
Magnetic resonance of the thoracic aortic disease
Pavel Berden, 2000, pregledni znanstveni članek

Povzetek: Conventional ECG gated spin-echo (SE) magnetic resonance imaging (MR) and magnetic resonance angiography (MRA) are excellent methods for diagnosing thoracic aortic disease. SE image provides a good spatial resolution for defining aortic anatomy and relationships to adjacent tissues. MRA shows flow but temporal resolution is inferior to conventional MR images. Contrast-enhanced 3D (three-dimensional) MRA is very accurate for defining thoracic aortic anatomy and is particularly good for defining branch vessel abnormality. The sensitivity and specificity for diagnosing aortic dissection are the highest in comparison to other modalities (echocardiography, CT angiography) and range from 95% to 100% and 94% to 100%, respectively. MR can define clearly the full diameter of aortic aneurysm and also shows the amount of thrombi within it and its craniocaudal extent. A combination of SE and cineMRA is usually necessary. The same sequence with contrast enhancement provides all the required information on the congenital abnormalities of the aorta. MR is very reliable in congenital aortic abnormalities, aortic aneurysmand aortic dissection in hemodynamically stable patients. It should beused for all chronic thoracic aortic disease and postsurgical follow-up. Unstable patients that need intensive hemodynamic monitoring are unsuitable for MR.
Objavljeno v DiRROS: 24.01.2024; Ogledov: 288; Prenosov: 59
.pdf Celotno besedilo (593,75 KB)

1163.
Magnetic resonance of cardiac tumors and masses
Pavel Berden, 2000, pregledni znanstveni članek

Povzetek: Cardiac tumors are rare and should be differentiated from nontumoral cardiac masses because of different therapeutic approach. For this purpose, spin-echo (SE) technique and gradient-echo (GE) technique are used in magnetic resonanceimaging (MR). The first provides anatomic evaluation of the heart andtissue characterization, while the second provides dynamic information on the blood flow and heart contraction. Cardiac myxoma is differential from thrombus by paramagnetic contrast agent administration. Their mobility is evaluated with GE technique. Lipomas and subacute hemorrhage have the same, high signal intensity on T1-weighted spin-echo image, therefore, the fat suppression technique is appropriate to recognize them. MR is used in evaluating the response of the malignant tumor to chemotherapy. GE MR is useful to differentiate between the thrombus and slow-flowing blood; the administration of gadolinium helps to distinguish the thrombus from the tumor.In patients suspected of having a cardiac tumor, echocardiography is thefirst method of choice. MR is used to confirm the findigs of echocardiography, to determine precisely the tumor location, extent, and its tissue characterization, to follow up patients under treatment, and to detect early tumor recurrence.
Objavljeno v DiRROS: 24.01.2024; Ogledov: 290; Prenosov: 59
.pdf Celotno besedilo (819,38 KB)

1164.
Magnetic resonance arthrography of the glenohumeral joint
Vladimir Jevtič, Anton Praprotnik, 2000, izvirni znanstveni članek

Povzetek: Background. The purpose of this study was to estimate the value of native magnetic resonance imaging (MRI) and direct gadopentate (Gd-DTPA) magnetic resonance arthrography (MRA) in diagnosing posttraumatic pathological changes of the glenohumeral joint. Patients and methods. In 27 consecutive patients with clinicaly significant trauma in whom native MRI of the glenohumeral jointwas not diagnostically conclusive direct MRA with paramegnetic contrast agent was accomplished. Following intraarticular injection of Gd-DTPA diluted in saline (concentration 0.2 mmol/l) T1W spin echo (SE) and gradient echo (GE)images were performed. Diagnostic results of native MRI and MRA were compared. Results. MRA revealed 5 rotator cuff lesions, 7 labral lesions, 4 osteochondral injuries and a loose body which were not definitely proved by native MRI. All the pathological findings of MRA were confirmed operatively orarthroscopically. Conslusion. Direct MRA with Gd-DTPA showed to be a more sensitive technique for the demonstration of clinically significant intraarticular posttraumatic changes than noncontrast MRI.
Objavljeno v DiRROS: 24.01.2024; Ogledov: 258; Prenosov: 66
.pdf Celotno besedilo (519,13 KB)

1165.
Optimizing hot-work tool steel microstructure for enhanced toughness
Anže Bajželj, Tilen Balaško, Barbara Šetina, Jaka Burja, 2024, izvirni znanstveni članek

Ključne besede: hot-work tool steel, austempering, bainitic transformation, lower bainite, impact toughness
Objavljeno v DiRROS: 24.01.2024; Ogledov: 326; Prenosov: 127
.pdf Celotno besedilo (9,12 MB)
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1166.
1167.
Computed tomographic angiography of body vasculature
Tomaž Kunst, Pavel Berden, 2000, pregledni znanstveni članek

Povzetek: Background. The introduction of helical CT scanners in combination with simultaneous opacification of vessels with contrast medium allows the demonstration of vessels within the chosen volume of interest. This examination is called CT angiography. Being a minimally invasive method, it has been quickly accepted in the spectrum of vessel-imaging modalities, as forexample: Doppler ultrasound, magnetic resonance angiography, transesophageal ultrasound etc. In the field of cardiovascular radiology, it has been used to demonstrate pathology of ascending and descending aorta, likethe aneurysms, dissection, traumatic rupture or congenital anomalies. It is also very useful in pre- and postoperative follow-up in the aortic stent-graft insertion, a method which has recently become popular. Also the CTangiography has greatly influenced the preoperative calculations and has clearly demonstrated the postoperative anatomical changes as well as complications (i.e. peristental leakage). Conclusions. In this context, it is comparable to intraarterial angiography and even offers some advantages over the latter. The only draw-back being somewhat lower spatial resolution and longer processing time, but with the advent of a new, so called multi-slice scanners and powerful workstations, these draw-backs will be minimized.
Objavljeno v DiRROS: 24.01.2024; Ogledov: 285; Prenosov: 59
.pdf Celotno besedilo (975,29 KB)

1168.
Computed tomographic angiography in intracranial vascular diseases
Zoran Miloševič, 2000, pregledni znanstveni članek

Povzetek: Background. The development of spiral computed tomography (CT) introduced a more precise imaging of the vessels also with computed tomographic angiography(CTA). Because it is a minimaly invasive method, it was widely accepted by radiologists and clinicians. In early 90ties CTA also accompanied conventional angiography and magnetic resonance angiography (MRA) in imaging of intracranial vascular diseases. CTA is used for the detection and evaluation of intracranial aneurysms, vascular malformations, stenoocclusive diseases of intracranial arteries and pathological changes of venous sinuses. Comparing to conventional angiography as the "gold standard", CTA has high specificity, sensibility and diagnostic accuracy concerning detections of intracranial aneurysms. Regarding vascular malformations, CTA is used for diagnostics and pre and postopeative evaluation of it. CTA can show good results in imaging of venous angiomas, and so invasive conventional angiography can be avoided in this pathology. Stenosis and occlusions of arteries can be diagnosed and evaluated in patients with cerebral vasospasm, patients with acute stroke, and patients with chronical arterial stenoses and occlusions. CTA is useful for the demonstration of occusive and stenosing changes of intracranial venous sinuses. Conclusion. With CTA it is possible togenerate threedimensional reconstructed images which give a more accurate determination of anatomical relations in intracranial vascular diseases. The main disadventage of CTA in comparison to intraarterial angiography is the lower spatial resolution of CTA, but is constantly imprving with the development of better scanners and workstations, so that there are great possibilities for further deveopement and wider use of CTA in the diagnosis ofintracranial vascaular diseases.
Objavljeno v DiRROS: 24.01.2024; Ogledov: 193; Prenosov: 48
.pdf Celotno besedilo (1,61 MB)

1169.
Ultrasound-guided aspiration biopsy of subclinical regional metastases of head and neck carcinoma
Alenka Višnar-Perovič, Aleksandar Aničin, Živa Zupančič, Bojana Černelč, Alojz Šmid, Dubravka Vidmar, Milan Gorenc, 2000, izvirni znanstveni članek

Povzetek: Background. Studies concerned with the estimation of ultrasound (US) combined with ultrasound-guided aspiration biopsy (USGAB) in the detection of subclinical regional metastases from the planocellular carcinoma of head and neck are promising, but in few cases. Recently, the authors have pointed out the role of lymph node size parameters in order to decide about the use of USGAB. The aim of this study was to test the reliability of US-USGAB for the detection of subclinical regional metastases in patients with planocellular head and neck carcinomas, including the evaluation of lymph node size parameters. Patients and methods. 121 neck sides with no palpable metastases were examined by US in 77 patients with planocellular carcinomas of head and neck. Depending on the results obtained, USGAB was performed on 64 neck sides.After surgery, the results of US-USGAB were compared with histological findings of the dissected lymph nodes. Results. The study showed 77% overall sensitivity of US and USGAB, and 100% specificity, while the versal / longiyudinal diameter was the best predictor of metastatic lymph node involvement. Conclusion. The results of this study established that USGAB is an appropriate method for detection the subclinical regional metastases on neck, and should be included into routine diagnostic work up in the evaluationof the extent of head and necks carcinomas.
Objavljeno v DiRROS: 24.01.2024; Ogledov: 218; Prenosov: 59
.pdf Celotno besedilo (415,17 KB)

1170.
Endovascular treatment of aortic aneurysm by endoprosthesis
Miloš Šurlan, Vladka Salapura, 2000, izvirni znanstveni članek

Povzetek: Aortic endoprosthesis are divided according to its shape, site of application,and construction material. Regarding the shape, there are tubular,unilateral and bifurcational endoprosthesis. Tubular are used mostly for treatment the thoracic aneurysm, and less for treatment of the abdominal aneurysms. For exclusion of abdominal aneurysm the bifurcational prosthesis ismostly used. Aortic endoprostheses are made of metallic support and prosthetic part. Supportive elements are made of stainless steel or nitinol, while the prosthetic part is made of dacron or PTFE. Metallic part of prosthesis attaches prosthesis to healthy part of aorta, above and below aneurysm, like sutures. It expands and gives support to the prosthesis. The procedure is precisely described for thoracic and abdominal aortic aneurysms. We describe the possible complications and the mechanism of leakage and its diagnosis. In the study are presented two cases of patients with aneurysm of thoracic aorta and one case with abdominal aorta, successfully treated in our Institution. The follow-up results after 2 years, in the patients with thoracic aortic aneurysm, and 6 months follow up in the patient with abdominalaortic aneurysm showed no signs of clinical or imaging complications.In conslusion, we were trying, on the basis of our experiences and results that have been recently published, to evaluate this method of treatment.
Objavljeno v DiRROS: 24.01.2024; Ogledov: 244; Prenosov: 61
.pdf Celotno besedilo (585,13 KB)

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