1. Radiographic, computed tomographic and magnetic resonance imaging appearances of primary V-cutting zone of resorption of lumbar vertebral body in Paget's diseaseVladimir Jevtič, 2004, professional article Abstract: Background. Paget's disease of bone typically demonstrates three evolutionary phases with the characteristic radiographic findings. The incipient stage is manifested by an advancing lytic zone of resorption. Unlike the skull and the long bones the primary advancing zone of rarefication has not been clearly demonstrated within the spine and pelvis. Case report. A 62-year-old man with histologically proved polyostotic Paget's disease was admitted to the hospitaldue to the exacerbation of pain at the toracolumbar junction with deterioration during the night. Due to slight elevation of acid phosphatase and clinical signs indicating prostatic hypertrophy the possibility of metastatic prostatic carcinoma has been raised. A bone scintigraphy with technetium phosphonate showed the expected marked increased uptake affecting numerous bones with the typical radiographic signs of Paget's disease. Besidesthese findings, there was also moderate focal accumulation within the right dorsal half of the vertebral body of L1. Conventional tomography, computed tomography (CT) and magnetic resonance imaging (MRI) demonstrated theprimary cutting zone of resorption affecting the same region. Conclusions. We present a unique case of Paget's disease with primary V-cutting zone withinthe undeformed vertebral body of L1 and spontaneous progression to the midphase of the disease on a three year follow-up.
Published in DiRROS: 13.02.2024; Views: 135; Downloads: 30
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2. History of the Clinical institute of radiology in Ljubljana on its 80th anniversary (1923-2003) : Historia magistra vitaeVladimir Jevtič, 2004, professional article Abstract: Backgraund. The manuscript presents a short history of the Clinical Radiology Institute in Ljubljana, University Clinical Centre, and the leading radiological institution in Slovenia since its establishment in 1923. Throughout its history the Institute has been faced with numerous obstacles. Its major problems have always included the lack of professional and economical independence, which has made it difficult for the Institute to keepup with the fask technological development of the world's radiology, as well as the shortage of radiologists and radiographers with the consequence ofthe excessive work load and difficulties in educational and research activities. Despite some serious problems the expertise of the Institute's Ieadership, together with the enthusiasm of all radiologists and radiographers, has enabled a continuous professional and technological development which is the basis of today's high quality diagnostic and interventional radiology. Many of the remarkable aehievements would not have been possible without some extraordinary personalities who laid down the solidfoundations of today's lnstitute. Conclusions. Eighty years of Clinical Radiology Institute in Ljubljana is a history of the successful development ofthe republic's leading radiological institution, a success based on determination, unity and the professional integrity af all its members and management.
Keywords: Ljubljana
Published in DiRROS: 13.02.2024; Views: 153; Downloads: 39
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3. A calcified cervical intervertebral disc in child and a thoracic disc calcification in an adult with posterior herniation-radiographic, computed tomography and magnetic resonance imaging findingsVladimir Jevtič, 2004, professional article Abstract: Izhodišča. Kalcifikacije nukleusa pulposusa pri otroku so sorazmerno redek, vendar dobro znan klinični sindrom, ki se običajno pojavlja na vratni hrbtenici. Natančen vzrok še vedno ni znan. Kalcifikacije medvretenčne ploščice odraslega so večinoma posledica degeneracije in se pojavIjajo v višini spodnje prsne in zgornje ledvene hrbtenice. Pri obeh entitetah lahko nastane resna komplikacija, posteriorna hernijacija kalcificiranega diskusa. Prikaz primera. Prikazana sta dva primera kalcificirane medvretenčne ploščice,prvi pri 7-letnem otroku v višini C7-T1 ter drugi pri 45-letni ženskiv višini T11-T12, oba z razsežno dorzalno hernijacijo. V prvem primeru je dosežena remisija s konservativnom zdravljenjem. Na podlagi analize radiografskih, računalniškotomografskih ter magnetnoresonančnih (MRI) spremembsmo ugotovili podobnosti in razlike med obema entitetama. Zaključki. Masivna dorzalna hernijacija kalcificiranega nukleusa pulposusa pri otroku je uspešno zdravljena konzervativno. Izginotje kliničnih znakov je sledilo hitri resorpciji kalcificirane diskus hernije. Pri odraslem po konzervativnem zdravljenju ni prišlo do resorpcije kalcificirane diskus hernije in kliničnih znakov izboljšanja. Z MRI je možen zgodnejši prikaz kalcifikacij. Tudi razširitev prizadetih medvretenčnih ploščic pri otroku je boljše prikazana z MRI. Razširitev kalcificiranih medvretenčnih ploščic podpira teorijo zvišanegaintradiskalnega pritiska kot vzroka rupture anulusa fibrozusa in posledične hernijacije nukleusa pulposusa.
Published in DiRROS: 07.02.2024; Views: 161; Downloads: 36
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4. Demonstration of evolution of hemispherical spondysclerosis by contrast enhanced Gd-DTPA magnetic resonance imagingVladimir Jevtič, Natalija Majcen, 2004, original scientific article Abstract: Izhodišča. Namen študije je bil ugotoviti vrednost slikovne magnetne resonance(MRI) s paramagnetnim kontrastnim sredstvom Gd-DTPA v prikazu napredovanja hemisferične spondiloskleroze (HSS). Bolniki in metode. Pri 18 bolnikih s kronično bolečino v križu in tipičnimi radiografskimi znaki HSS smoopravili Gd-DTPA MRI lumbalne hrbtenice. Primerjali smo morfološke spremembe in spremembe intenzitete signala z radiografskimi znaki HSS. Rezultati. Na podlagi MRI smo primere razdelili v tri skupine. V prvi skupini je bilo radiografsko področje osteoskleroze hipointenzivno na T1-poudarjenih spin-eho slikah, hiperintenzivno na T2-poudarjenih slikah in je kazalo difuznonabiranje paramagnetnega kontrastnega sredstva. Opisane spremembe so bile združljive s kostnim edemom in hiperemijo. V drugi skupini so bili robovivretenc na vseh slikovnih sekvencah hiperintenzivni, obdani s hipointenzivno cono in se v njih ni nabiralo kontrastno sredstvo. Opisano je izražalo kombinacijo maščevja in kostne skleroze. Pri preostalih bolnikih so MRI znaki predstavljali kombinacijo sprememb vidnih v prvi in drugi skupini. Zaključki. Gd-DTPA MRI kaže zapletene histološke spremembe v teku napredovanjaHSS. Spremljanje značilnih MRI znakov ima lahko klinični pomen prisledenju bolezni.
Published in DiRROS: 07.02.2024; Views: 212; Downloads: 39
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7. MRI macromolecular contrast agents as indicators of changed tumor blood flowTeodora Ivanuša, Katarina Beravs, Maja Čemažar, Vladimir Jevtič, Franci Demšar, Gregor Serša, 2001, original scientific article Abstract: Background. A rapid mapping technique derived from dynamic contrast enhanced MRI data was used to identify and characterize reduction of blood flow in fibrosarcoma SA-1 tumors treated either by application of electric pulses or vinblastine. Materials and methods. Tissue permeability surface area product (PS) and fractional blood volume (BV) were calculated on a pixel-by-pixel basis using dynamic MRI intensity data after administration of gadomer - 17 orpolylysine-Gd-DTPA; prototypic macromolecular contrast agents designed for blood pool enhancement. PS and BV values of untreated tumors were compared to those of tumors treated by local application of 8 electric pulses (amplitude/distance ratio, 1300 V/cm; duration, 100 us, frequency, 1 Hz) percutaneously to the tumor or by systemic administration of vinblastine (2.5 mg/kg). Results. Both treatments transiently, but significantly reduced tumor blood flow, application of electric pulses to the tumors being by 40% more effective in reducing tumor blood flow than systemic administration of vinblastine. PS and BV values derived with polylysine-Gd-DTPA-enhanced MRI were lower compared to those with gadomer-17, due to larger molecular size. Interestingly, Gd-DTPA-enhanced MRI did not show any significant changes of PSand BV between untreated and treated tumors. Conclusion. This study demonstrates that dynamic contrast enhanced MRI can be effectively used to qualitatively monitor tumor blood flow, and quantitatively by means of BV and PS.
Published in DiRROS: 25.01.2024; Views: 182; Downloads: 39
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9. Magnetic resonance arthrography of the glenohumeral jointVladimir Jevtič, Anton Praprotnik, 2000, original scientific article Abstract: 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.
Published in DiRROS: 24.01.2024; Views: 169; Downloads: 39
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