Biomedical imaging and intervention journal最新文献

{"title":"A rare case of an appendiceal mass masquerading as a pelvic tumour and causing bilateral hydronephrosis.","authors":"Sn Abdul Rashid,&nbsp;S Ab Hamid,&nbsp;S Mohamad Saini,&nbsp;R Muridan","doi":"10.2349/biij.8.2.e11","DOIUrl":"https://doi.org/10.2349/biij.8.2.e11","url":null,"abstract":"<p><p>Diagnosing acute appendicitis in children can be difficult due to atypical presenting symptoms. While there are reported cases of acute appendicitis or appendiceal masses causing unilateral hydronephrosis, bilateral hydronephrosis as a complication of appendiceal mass is very rare. We report a case of a child who presented with cardinal symptomatology associated with the urogenital tract. Ultrasound (US) investigation showed a pelvic mass causing bilateral hydronephrosis. An initial diagnosis of a pelvic teratoma was made based on the US and computed tomography (CT) scan findings. The final diagnosis of an appendiceal mass causing bilateral hydronephrosis was established intraoperatively.</p>","PeriodicalId":89331,"journal":{"name":"Biomedical imaging and intervention journal","volume":"8 2","pages":"e11"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2349/biij.8.2.e11","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30899569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pelvic lipomatosis: US and CT diagnosis.","authors":"Y Yesilkaya,&nbsp;M Duymus,&nbsp;M Topcuoglu","doi":"10.2349/biij.8.2.e12","DOIUrl":"https://doi.org/10.2349/biij.8.2.e12","url":null,"abstract":"Pelvic lipomatosis is an uncommon benign disease that causes different symptoms due to the compression of pelvic organs by an intrapelvic overgrowth of mature fatty tissue. Engels first described the condition in 1959 [1]. The aetiology of the disease has not been established. However, it has been speculated that the fat proliferation might be associated with chronic pelvic inflammation due to chronic urinary tract infection [2]. In adults, endocrine diseases such as Cushing’s syndrome, hypothyroidism, insulin-secreting tumours, and neoplastic disease involving the hypothalamus (mainly craniopharyngioma) may also be a factor in the acquired obesity [2, 3]. Imaging is crucial in the diagnosis of pelvic lipomatosis. CT scans are considered to be the most effective and essential form of examination. The technique ensures dependable diagnosis of the disease principally because the absorption coefficient of the intrapelvic fatty tissue calculated by computer is distinct from that of other tissues. In the case we describe here, the diseases above could be ruled out based on the pattern of fat distribution, the clinical situation, and laboratory data. Laboratory results were all within normal limits. Pelvic lipomatosis typically exhibits a wide variety of symptoms including lumbago, discomfort of the lower abdomen, low-grade fever, recurrent urinary infections, frequent urination, dysuria, constipation, and hypertension [2, 4]. Our patient only had non-specific back pain.","PeriodicalId":89331,"journal":{"name":"Biomedical imaging and intervention journal","volume":"8 2","pages":"e12"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2349/biij.8.2.e12","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30899570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quality assurance of TomoDirect treatment plans using I'mRT MatriXX.","authors":"Cw Kong,&nbsp;Sk Yu,&nbsp;Ky Cheung,&nbsp;H Geng,&nbsp;Yw Ho,&nbsp;Ww Lam,&nbsp;Wk Wong","doi":"10.2349/biij.8.2.e14","DOIUrl":"https://doi.org/10.2349/biij.8.2.e14","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the performance of 2D-array I'mRT MatriXX for dose verification of TomoDirect treatment plans.</p><p><strong>Methods: </strong>In this study, a 2D-array ion chamber device - the I'mRT MatriXX and Multicube Phantom from IBA - was used for dose verification of different TomoDirect plans. Pre-treatment megavoltage computed tomography (MVCT) was performed on the phantom setup for position correction. After the irradiation of treatment plans on the I'mRT MatriXX and Multicube Phantom, the measured doses of coronal planes were compared with those from the planning calculations for verification. The results were evaluated by comparing the absolute dose difference in the high dose region as well as the gamma analysis of the 2D-dose distributions on the coronal plane. The comparison was then repeated with the measured dose corrected for angular dependence of the MatriXX.</p><p><strong>Results: </strong>When angular dependence is taken into account, the passing rate of gamma analysis is over 90% for all measurements using the MatriXX. If there is no angular dependence correction, the passing rate of gamma analysis worsens for treatment plans with dose contribution from the rear. The passing rate can be as low as 53.55% in extreme cases, i.e. where all doses in the treatment plan are delivered from the rear.</p><p><strong>Conclusion: </strong>It is important to correct the measured dose for angular dependence when verifying TomoDirect treatment plans using the MatriXX. If left uncorrected, a large dose discrepancy may be introduced to the verification results.</p>","PeriodicalId":89331,"journal":{"name":"Biomedical imaging and intervention journal","volume":"8 2","pages":"e14"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2349/biij.8.2.e14","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30899572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effective connectivity between superior temporal gyrus and Heschl's gyrus during white noise listening: linear versus non-linear models.","authors":"Ka Hamid,&nbsp;An Yusoff,&nbsp;Mza Rahman,&nbsp;M Mohamad,&nbsp;Aia Hamid","doi":"10.2349/biij.8.2.e13","DOIUrl":"https://doi.org/10.2349/biij.8.2.e13","url":null,"abstract":"<p><strong>Purpose: </strong>This fMRI study is about modelling the effective connectivity between Heschl's gyrus (HG) and the superior temporal gyrus (STG) in human primary auditory cortices. MATERIALS #ENTITYSTARTX00026;</p><p><strong>Methods: </strong>Ten healthy male participants were required to listen to white noise stimuli during functional magnetic resonance imaging (fMRI) scans. Statistical parametric mapping (SPM) was used to generate individual and group brain activation maps. For input region determination, two intrinsic connectivity models comprising bilateral HG and STG were constructed using dynamic causal modelling (DCM). The models were estimated and inferred using DCM while Bayesian Model Selection (BMS) for group studies was used for model comparison and selection. Based on the winning model, six linear and six non-linear causal models were derived and were again estimated, inferred, and compared to obtain a model that best represents the effective connectivity between HG and the STG, balancing accuracy and complexity.</p><p><strong>Results: </strong>Group results indicated significant asymmetrical activation (p(uncorr) < 0.001) in bilateral HG and STG. Model comparison results showed strong evidence of STG as the input centre. The winning model is preferred by 6 out of 10 participants. The results were supported by BMS results for group studies with the expected posterior probability, r = 0.7830 and exceedance probability, ϕ = 0.9823. One-sample t-tests performed on connection values obtained from the winning model indicated that the valid connections for the winning model are the unidirectional parallel connections from STG to bilateral HG (p < 0.05). Subsequent model comparison between linear and non-linear models using BMS prefers non-linear connection (r = 0.9160, ϕ = 1.000) from which the connectivity between STG and the ipsi- and contralateral HG is gated by the activity in STG itself.</p><p><strong>Conclusion: </strong>We are able to demonstrate that the effective connectivity between HG and STG while listening to white noise for the respective participants can be explained by a non-linear dynamic causal model with the activity in STG influencing the STG-HG connectivity non-linearly.</p>","PeriodicalId":89331,"journal":{"name":"Biomedical imaging and intervention journal","volume":"8 2","pages":"e13"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2349/biij.8.2.e13","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30899571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Congenital renal anomalies detected in adulthood.","authors":"M Muttarak,&nbsp;T Sriburi","doi":"10.2349/biij.8.1.e7","DOIUrl":"https://doi.org/10.2349/biij.8.1.e7","url":null,"abstract":"<p><strong>Objective: </strong>To document the types of congenital renal anomalies detected in adulthood, the clinical presentation and complications of these renal anomalies, and the most useful imaging modality in detecting a renal anomaly.</p><p><strong>Materials and methods: </strong>This study was approved by the institutional review board and informed consent was waived. Between January 2007 and January 2011, the clinical data and imaging studies of 28 patients older than 18 years diagnosed with renal anomaly at the authors' institution were retrospectively reviewed. Renal anomalies in this study included only those with abnormality in position and in form.</p><p><strong>Results: </strong>Of these 28 patients, 22 underwent imaging studies and their results constituted the material of this study. Of the 22 patients, 14 had horseshoe kidneys (HSK), four had crossed renal ectopia and four had malrotation. Sixteen patients were men and six were women. The patients ranged in age from 19 to 74 years (mean age 51.1 years). Clinical presentations were abdominal pain (13), fever (13), haematuria (4), palpable mass (2), asymptomatic (2), polyuria (1) dysuria (1), blurred vision (1), and headache with weakness of left extremities (1). Imaging studies included abdominal radiograph (15), intravenous pyelography (IVP) (8), retrograde pyelography (RP) (4), ultrasonography (US) (7), and computed tomography (CT) (9). Associated complications included urinary tract stones (17), urinary tract infection (16), hydronephrosis (12), and tumours (2). Abdominal radiograph suggested renal anomalies in nine out of 15 studies. IVP, RP, US and CT suggested anomalies in all patients who had these studies performed. However, CT was the best imaging modality to evaluate anatomy, function and complications of patients with renal anomalies.</p><p><strong>Conclusion: </strong>HSK was the most common renal anomaly, with abdominal pain and fever being the most common presentations. UTI and stones were the most common complications. IVP, RP, US and CT can be used to diagnose renal anomalies but CT is the best imaging modality to evaluate renal anatomy, function and its complications.</p>","PeriodicalId":89331,"journal":{"name":"Biomedical imaging and intervention journal","volume":"8 1","pages":"e7"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2349/biij.8.1.e7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30897039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multislice CT of the head and body routine scans: Are scanning protocols adjusted for paediatric patients?","authors":"Z Sun, Ks Al Ghamdi, Ih Baroum","doi":"10.2349/biij.8.1.e3","DOIUrl":"10.2349/biij.8.1.e3","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate whether the multislice CT scanning protocols of head, chest and abdomen are adjusted according to patient's age in paediatric patients.</p><p><strong>Materials and methods: </strong>Multislice CT examination records of paediatric patients undergoing head, chest and abdomen scans from three public hospitals during a one-year period were retrospectively reviewed. Patients were categorised into the following age groups: under 4 years, 5-8 years, 9-12 years and 13-16 years, while the tube current was classified into the following ranges: < 49 mA, 50-99 mA, 100-149 mA, 150-199 mA, > 200 mA and unknown.</p><p><strong>Results: </strong>A total of 4998 patient records, comprising a combination of head, chest and abdomen CT scans, were assessed, with head CT scans representing nearly half of the total scans. Age-based adjusted CT protocols were observed in most of the scans with higher tube current setting being used with increasing age. However, a high tube current (150-199 mA) was still used in younger patients (0-8 years) undergoing head CT scans. In one hospital, CT protocols remained constant across all age groups, indicating potential overexposure to the patients.</p><p><strong>Conclusion: </strong>This analysis shows that paediatric CT scans are adjusted according to the patient's age in most of the routine CT examinations. This indicates increased awareness regarding radiation risks associated with CT. However, high tube current settings are still used in younger patient groups, thus, optimisation of paediatric CT protocols and implementation of current guidelines, such as age-and weight-based scanning, should be recommended in daily practice.</p>","PeriodicalId":89331,"journal":{"name":"Biomedical imaging and intervention journal","volume":"8 1","pages":"e3"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3432222/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30897035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mammographic breast density and other risk factors in Malaysian women with breast cancer","authors":"Zulfiqar Ma, M. Aslinda, N. Abdullah, N. Isa, K. Shamsuddin","doi":"10.2349/BIIJ.8.3.E17","DOIUrl":"https://doi.org/10.2349/BIIJ.8.3.E17","url":null,"abstract":"","PeriodicalId":89331,"journal":{"name":"Biomedical imaging and intervention journal","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2349/BIIJ.8.3.E17","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68771069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chest wall seeding of nocardiosis as a complication of a percutaneous transthoracic needle biopsy","authors":"S. F. Low, N. Bakar, Ngiu Chai Soon","doi":"10.2349/BIIJ.8.4.E22","DOIUrl":"https://doi.org/10.2349/BIIJ.8.4.E22","url":null,"abstract":"","PeriodicalId":89331,"journal":{"name":"Biomedical imaging and intervention journal","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2349/BIIJ.8.4.E22","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68771146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anatomical variations of pulmonary venous drainage in Thai people: multidetector CT study.","authors":"Y Wannasopha,&nbsp;N Oilmungmool,&nbsp;J Euathrongchit","doi":"10.2349/biij.8.1.e4","DOIUrl":"https://doi.org/10.2349/biij.8.1.e4","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the patterns of pulmonary venous drainage into the left atrium and to determine the frequency of each variant of pulmonary venous anatomy.</p><p><strong>Materials and methods: </strong>After institutional review board approval (No. 09JUL011148), 300 studies of thoracic multidetector computed tomography were retrospectively reviewed for the anatomical features of the pulmonary vein and its drainage pattern into the left atrium. The percentage of each pattern was calculated.</p><p><strong>Results: </strong>The anatomy of pulmonary venous drainage in 300 patients (150 male and 150 female, mean age 60.16 years) showed some variation. In the right pulmonary vein, the most common drainage pattern was two ostia (90.33%), followed by three to five ostia (6.33%) and a single ostium (3.33%). There were one or two separate middle lobe vein ostia in groups of more than two openings. On the left side, there were two patterns; a single venous ostium (59%) was much more common than two ostia (41%). In both right and left pulmonary veins, there were five cases (2 male, 3 female) that had a single pulmonary venous ostium, bilaterally. However, there were only 17 cases (5.67%), out of 300 enrolled in this study, that had bilateral pulmonary venous ostial variations.</p><p><strong>Conclusion: </strong>A classification system to succinctly describe pulmonary venous drainage patterns was developed. In left-sided drainage, a single left pulmonary ostium was the most common variation. The right-sided venous drainage varied more in both number and pattern than those of the left side; nevertheless, bilateral pulmonary venous ostial variation was not frequently found.</p>","PeriodicalId":89331,"journal":{"name":"Biomedical imaging and intervention journal","volume":"8 1","pages":"e4"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2349/biij.8.1.e4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30897036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Precocious puberty in children: A review of imaging findings.","authors":"Mz Faizah, Ah Zuhanis, R Rahmah, Aa Raja, Ll Wu, Aa Dayang, Ma Zulfiqar","doi":"10.2349/biij.8.1.e6","DOIUrl":"10.2349/biij.8.1.e6","url":null,"abstract":"<p><strong>Objectives: </strong>This review was aimed at determining the imaging findings in patients with precocious puberty.</p><p><strong>Results: </strong>Within a period of 8 years (from 2002 to 2010) there were 53 patients diagnosed with precocious puberty. Out of the 53 patients, 37 had undergone diagnostic imaging to detect the possible organic causes of precocious puberty. Imaging findings were positive in 31 patients and out of that, 3 patients had 2 findings each (34 abnormalities). Of the patients with positive imaging findings, central precocious puberty (gonadotrophin-dependent) was more common (81%; 25/31) and the causes included: tuber cinereum hamartoma (n = 10), glioma (n = 6), pineal gland tumour (n = 4), hydrocephalous (n = 3), arachnoid cyst (n = 2) and others (n = 3). Peripheral precocious puberty (gonadotrophin-independent) causes included: testicular adrenal rest tumour (n = 3), adrenal carcinoma (n = 1), ovarian granulosa thecal cell tumour (n = 1), and tuberous sclerosis (n = 1).</p><p><strong>Conclusion: </strong>Positive imaging findings were observed in 84% (31/37) of the subjects. Hypothalamic hamartoma was the most common imaging finding in central precocious puberty while testicular adrenal rest tumour was the most common imaging finding in peripheral precocious puberty.</p>","PeriodicalId":89331,"journal":{"name":"Biomedical imaging and intervention journal","volume":"8 1","pages":"e6"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3432225/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30897038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}