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Acta Radiologica Open

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https://www.readbyqxmd.com/read/28203389/mr-appearance-of-the-temporal-evolution-and-resolution-of-spontaneous-osteonecrosis-of-the-knee-a-case-report
#1
Mats Geijer, Jan Jureus, Mari Hanni, Adel Shalabi
Spontaneous osteonecrosis of the knee (SONK) is a feared condition of unknown cause, in its classic form appearing in the medial femoral condyle in middle-aged or elderly subjects. Diagnosis with radiography is notoriously difficult with a long latency before typical changes appear. Magnetic resonance imaging (MRI) is regarded as a diagnostic tool with the possibility to give an earlier diagnosis with improved chances for treatment. However, also with MRI there may be an initial diagnostic blind spot before typical changes appear...
February 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28210496/the-additional-utility-of-apparent-diffusion-coefficient-values-of-clear-cell-renal-cell-carcinoma-for-predicting-metastasis-during-clinical-staging
#2
Rika Yoshida, Takeshi Yoshizako, Araki Hisatoshi, Hiroshi Mori, Yukihisa Tamaki, Noriyoshi Ishikawa, Hajime Kitagaki
BACKGROUND: The apparent diffusion coefficient (ADC) value is known to be an indicator of tumor activity. The ADC value of high-grade clear-cell renal cell carcinoma (RCC) is significantly lower than that of low-grade clear-cell RCC. PURPOSE: To investigate the utility of ADC values of clear-cell RCC by comparing ADC values between groups with T1a RCC (tumor size ≤ 4 cm) without metastasis and the group with metastasis. MATERIAL AND METHODS: A retrospective review was performed on 51 patients with 51 RCCs who underwent 1...
January 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28210495/reproducibility-of-pulmonary-blood-flow-measurements-by-phase-contrast-mri-using-different-1-5-t-mr-scanners-at-two-institutions
#3
Rin Iraha, Nanae Tsuchiya, Tsuneo Yamashiro, Tae Iwasawa, Sadayuki Murayama
BACKGROUND: Magnetic resonance imaging (MRI) can be beneficial for diagnosis of disease by offering quantitative information. However, reproducibility can be a major problem when there is a numerical threshold in multi-institution, multi-vendor situations. PURPOSE: To measure pulmonary blood flow with phase-contrast (PC) imaging using two different MR scanners (1.5 T) at different institutions in the same participants and to examine the reproducibility of the measurements...
January 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/27994882/jugular-venous-reflux-on-magnetic-resonance-angiography-and-radionuclide-venography
#4
Yasutaka Fushimi, Tomohisa Okada, Sachi Okuchi, Akira Yamamoto, Mitsunori Kanagaki, Koji Fujimoto, Kaori Togashi
BACKGROUND: The relationship between the signal from retrograde venous flow on magnetic resonance angiography (MRA) and retrograde upward flow from the left brachiocephalic vein has not been explored. PURPOSE: To reveal the frequency of jugular venous reflux using MRA and nuclear venography in patients being evaluated for cerebral volume and blood flow. MATERIAL AND METHODS: A total of 229 patients with cognitive disturbance who had undergone brain magnetic resonance imaging (MRI) and single-photon emission computed tomography (SPECT) on the same day to evaluate cerebral blood flow were evaluated...
December 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27994881/endovascular-treatment-of-spontaneous-isolated-abdominal-aortic-dissection
#5
Anna Maria Giribono, Doriana Ferrara, Flavia Spalla, Donatella Narese, Umberto Bracale, Felice Pecoraro, Renata Bracale, Luca Del Guercio, Umberto Marcello Bracale
Isolated abdominal aortic dissection is a rare clinical disease representing only 1.3% of all dissections. There are a few case series reported in the literature. The causes of this pathology can be spontaneous, iatrogenic, or traumatic. Most patients are asymptomatic and symptoms are usually abdominal or back pain, while claudication and lower limb ischemia are rare. Surgical and endovascular treatment are two valid options with acceptable results. We herein describe nine cases of symptomatic spontaneous isolated abdominal aortic dissection, out of which four successfully were treated with an endovascular approach between July 2003 and July 2013...
December 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27994880/a-computer-assisted-systematic-quality-monitoring-method-for-cervical-hip-fracture-radiography
#6
Mats Geijer, Olof Laurin, Ragnar Johnsson, Sven Laurin
BACKGROUND: A thorough quality analysis of radiologic performance is cumbersome. Instead, the prevalence of missed cervical hip fractures might be used as a quality indicator. PURPOSE: To validate a computer-based quality study of cervical hip fracture radiography. MATERIAL AND METHODS: True and false negative and positive hip trauma radiography during 6 years was assessed manually. Patients with two or more radiologic hip examinations before surgery were selected by computer analysis of the databases...
December 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27900204/preoperative-mr-staging-of-cervical-carcinoma-are-oblique-and-contrast-enhanced-sequences-necessary
#7
Susanne Fridsten, Ann-Cathrin Hellström, Kristina Hellman, Anders Sundin, Boel Söderén, Lennart Blomqvist
BACKGROUND: As the choice of treatment in patients with cervical carcinoma depends on cancer stage at diagnosis, accurate staging is essential. PURPOSE: To compare three different combinations of magnetic resonance (MR) sequences for preoperative staging. MATERIAL AND METHODS: Fifty-seven consecutive patients with biopsy proven cervical carcinoma underwent MR imaging (MRI) staging followed by primary surgical treatment. Thirty-two of 57 patients had had a cone biopsy prior to MRI...
November 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27900203/combined-hepatocellular-cholangiocarcinoma-with-stem-cell-features-cholangiolocellular-subtype-after-inferior-vena-cava-stent-placement-for-a-patient-with-budd-chiari-syndrome
#8
Makoto Sakane, Keigo Osuga, Takahiro Matsui, Hidetoshi Eguchi, Masatoshi Hori, Noriyuki Tomiyama
We report a case of combined hepatocellular-cholangiocarcinoma with stem cell features, cholangiolocellular subtype arising about 15 years after placement of an inferior vena cava stent for primary Budd-Chiari syndrome. Pre-surgical differentiation of the tumor from hepatocellular carcinoma was difficult because of elevated levels of alpha-fetoprotein and hypervascularity in the arterial phase. Histopathological examination revealed atypical cells forming ductal and alveolar structures showing a vague border with the surrounding liver...
November 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27900202/radiological-imaging-features-of-glioblastoma-with-oligodendroglioma-component-a-comparison-with-conventional-glioblastoma
#9
Masafumi Kanoto, Kazukuni Kirii, Yuuki Toyoguchi, Masashi Nishihara, Keita Sakurai, Kazuhiro Murayama, Tomoyuki Noguchi, Kenichiro Matsuda, Kaori Sakurada, Yukihiko Sonoda, Takaaki Hosoya
BACKGROUND: Glioblastoma with oligodendroglioma component (GBMO) is a subtype of conventional glioblastoma (cGBM), which is categorized as WHO grade IV. GBMO can be histopathologically distinguished from cGBM and the prognosis of GBMO is better than that of cGBM. However, no systematic review of GBMO imaging findings has been published to date. PURPOSE: To clarify the radiological imaging features of GBMO compared with those of cGBM. MATERIAL AND METHODS: The participants were 15 patients with GBMO and 32 patients with cGBM as a control group, all of whom were histopathologically diagnosed...
November 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27900201/the-diagnosis-and-treatment-of-rapunzel-syndrome
#10
Zhe Wang, Feng Cao, Diangang Liu, Yu Fang, Fei Li
Trichobezoars are hairballs or hair-like fibers formed by chewing and swallowing hair or any other indigestible materials. Trichobezoars usually form in the gastric body and are thus prepyloric. However, trichobezoars may rarely pass through the pylorus into the duodenum, jejunum, ileum, and even the colon, in a condition referred to as Rapunzel syndrome. Here, we present a case of a 13-year-old girl with this rare syndrome and discuss the diagnosis and treatment of the disease.
November 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27867536/life-threatening-mrsa-sepsis-with-bilateral-pneumonia-osteomyelitis-and-septic-arthritis-of-the-knee-in-a-previously-healthy-13-year-old-boy-a-case-report
#11
Nina Hardgrib, Michala Wang, Anne Grethe Jurik, Klaus K Petersen
The incidence and severity of methicillin resistant Staphylococcus aureus (MRSA) infections are increasing and cause high mortality and morbidity. We describe the first pediatric case in Scandinavia with Panton-Valentine leucocidin (PVL) positive MRSA septicemia who developed bilateral pneumonia, arthritis of the knee, and osteomyelitis of the tibia. Radiological investigation and interpretation directed the treatment, especially the surgical debridement, and combined with clinical and biochemical findings lead to close interdisciplinary treatment with frequent surgical interventions and antimicrobial combination therapy...
October 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27733937/a-rare-case-of-pancreatic-endometriosis-in-a-postmenopausal-woman-and-review-of-the-literature
#12
Verena Plodeck, Ulrich Sommer, Gustavo B Baretton, Daniela E Aust, Michael Laniado, Ralf-Thorsten Hoffmann, Ivan Platzek
Pancreatic endometriosis is very rare with only a few cases reported in the literature. The imaging features are non-specific and the definitive diagnosis is usually only established after surgery. We report on a 68-year-old woman with left upper quadrant pain who demonstrated a mass in the pancreatic tail on imaging. Laboratory results showed only mildly elevated liver enzymes, tumor markers were within the normal range. A left pancreatectomy was performed, frozen section suggesting a benign lesion, and final histopathology confirmed endometriotic cysts...
September 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27708860/whole-body-mri-for-full-assessment-and-characterization-of-diffuse-inflammatory-myopathy
#13
Saleh Saleh Elessawy, Eman Muhammad Abdelsalam, Eman Abdel Razek, Samar Tharwat
BACKGROUND: Conventional magnetic resonance imaging (MRI) is a highly valuable tool for full assessment of the extent of bilateral symmetrical diffuse inflammatory myopathy, owing to its high sensitivity in the detection of edema which correlates with, and sometimes precedes, clinical findings. PURPOSE: To evaluate the use of whole-body (WB)-MRI in characterization and full assessment of the extent and distribution of diffuse inflammatory myopathy. MATERIAL AND METHODS: A prospective study on 15 patients presenting with clinical evidence of inflammatory myopathy...
September 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27651931/magnetization-transfer-imaging-reveals-geniculocalcarine-and-striate-area-degeneration-in-primary-glaucoma-a-preliminary-study
#14
Yan Zhang, Wenwen Liang, Guijun Wu, Xuelin Zhang, Ge Wen
BACKGROUND: Glaucoma is a neurodegenerative disease that affects both the retina and central visual pathway. Magnetization transfer imaging (MTI) is a sensitive magnetic resonance imaging (MRI) technique that can detect degenerative changes in the brain. PURPOSE: To investigate the geniculocalcarine (GCT) and striate areas in primary glaucoma patients using region of interest (ROI) analysis of magnetization transfer ratio (MTR). MATERIAL AND METHODS: Twenty patients with primary glaucoma in both eyes were compared with 31 healthy control patients...
September 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27651930/combination-therapy-using-pse-and-tio-ameliorates-hepatic-encephalopathy-due-to-intrahepatic-portosystemic-venous-shunt-in-idiopathic-portal-hypertension
#15
Seiichiro Kojima, Hiroyuki Ito, Shinji Takashimizu, Hitoshi Ichikawa, Tomohiro Matsumoto, Terumitsu Hasebe, Norihito Watanabe
A 64-year-old woman treated for anemia and ascites exhibited hepatic encephalopathy. Abdominal ultrasonography and computed tomography (CT) showed communication between the portal vein and the middle hepatic vein, indicating an intrahepatic portosystemic venous shunt (PSS). Since hepatic encephalopathy of the patient was resistant to medical treatment, interventional radiology was performed for the treatment of shunt obliteration. Hepatic venography showed anastomosis between the hepatic vein branches, supporting the diagnosis of idiopathic portal hypertension (IPH)...
September 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27635254/pulmonary-tumor-thrombotic-microangiopathy-caused-by-prostate-carcinoma
#16
Daisuke Katayama, Keiko Kuriyama, Tatsuya Kinoshita, Keisuke Nagai, Hidenari Hongyo, Kentaro Kishimoto, Atsuo Inoue, Manabu Takamura, Soomi Choi
Pulmonary tumor thrombotic microangiopathy (PTTM) is a fatal malignancy-related condition that involves rapidly progressing hypoxia and pulmonary hypertension. We report a case of PTTM caused by prostate carcinoma, which was diagnosed before autopsy in an 81-year-old man. Computed tomography showed diffuse ground-glass opacities, consolidation, and small nodules in the peripheral regions of the lung. Autopsy showed adenocarcinoma cells embolizing small pulmonary arteries with fibrocellular intimal proliferation, which was consistent with PTTM caused by prostate carcinoma...
August 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27635253/influence-of-model-based-iterative-reconstruction-algorithm-on-image-quality-of-multiplanar-reformations-in-reduced-dose-chest-ct
#17
Heloise Barras, Vincent Dunet, Anne-Lise Hachulla, Jochen Grimm, Catherine Beigelman-Aubry
BACKGROUND: Model-based iterative reconstruction (MBIR) reduces image noise and improves image quality (IQ) but its influence on post-processing tools including maximal intensity projection (MIP) and minimal intensity projection (mIP) remains unknown. PURPOSE: To evaluate the influence on IQ of MBIR on native, mIP, MIP axial and coronal reformats of reduced dose computed tomography (RD-CT) chest acquisition. MATERIAL AND METHODS: Raw data of 50 patients, who underwent a standard dose CT (SD-CT) and a follow-up RD-CT with a CT dose index (CTDI) of 2-3 mGy, were reconstructed by MBIR and FBP...
August 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27583170/biparametric-versus-multiparametric-mri-in-the-diagnosis-of-prostate-cancer
#18
Karen Cecilie Duus Thestrup, Vibeke Logager, Ingerd Baslev, Jakob M Møller, Rasmus Hvass Hansen, Henrik S Thomsen
BACKGROUND: Since multiparametric magnetic resonance imaging (mp-MRI) of the prostate exceeds 30 min, minimizing the evaluation time of significant (Gleason scores > 6) prostate cancer (PCa) would be beneficial. A reduced protocol might be sufficient for the diagnosis. PURPOSE: To study whether a short unenhanced biparametric MRI (bp-MRI) matches mp-MRI in detecting significant PCa. MATERIAL AND METHODS: A total of 204 men (median age, 65 years; mean ± SD, 64...
August 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27583169/can-use-of-adaptive-statistical-iterative-reconstruction-reduce-radiation-dose-in-unenhanced-head-ct-an-analysis-of-qualitative-and-quantitative-image-quality
#19
Bjørn Helge Østerås, Kristin Livelten Heggen, Hans Kristian Pedersen, Hilde Kjernlie Andersen, Anne Catrine T Martinsen
BACKGROUND: Iterative reconstruction can reduce image noise and thereby facilitate dose reduction. PURPOSE: To evaluate qualitative and quantitative image quality for full dose and dose reduced head computed tomography (CT) protocols reconstructed using filtered back projection (FBP) and adaptive statistical iterative reconstruction (ASIR). MATERIAL AND METHODS: Fourteen patients undergoing follow-up head CT were included. All patients underwent full dose (FD) exam and subsequent 15% dose reduced (DR) exam, reconstructed using FBP and 30% ASIR...
August 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27570638/clinical-results-of-renal-artery-embolization-to-control-postoperative-hemorrhage-after-partial-nephrectomy
#20
Chang Ho Jeon, Nak Jong Seong, Chang Jin Yoon, Seok-Soo Byun, Sang Eun Lee
BACKGROUND: With the wider application of nephron-sparing surgery, there has been an increase in the occurrence of postoperative hemorrhage. However, despite such an increase, there are only a limited number of reports regarding renal artery embolization (RAE) for the management of postoperative bleeding after nephron-sparing surgery, especially after robot-assisted laparoscopic partial nephrectomy (RALPN). PURPOSE: To evaluate the safety and clinical efficacy of transcatheter RAE for postoperative hemorrhage after open partial nephrectomy (OPN) and RALPN...
August 2016: Acta Radiologica Open
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