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C-1122

Changes in the microstructural components of brain networks in pain relief - a network based Diffusion Tensor Imaging study.

P. Naumczyk1, A. Sabisz1, A. Glińska2, K. Basiński2, A. Basiński2, E. Szurowska1; 1 Gdansk/PL 2 Gdańsk/PL

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Aims and objectives: Previous studies suggest that neural underpinnings of the pain experience differ depending on whether the acute or the chronic pain is being considered (Apkarian, 2011). Acute nociceptive information evokes neural response in various regions, including the insula, the nucleus accumbens and the anter[...]

Methods and materials: Twelve subjects with chronic low back pain were scanned with Acheva TX 3.0T MRI scanner on an 8-channel head coil twice during one day, with a regional nerve blockade administered in between the sessions. Subjects were 9 women and 4 men, aged 50.6 years on average (standard deviation: 8.8 years). Th[...]

Results: All results are reported with significance level of p<0.01 with Bonfferoni correction for multiple comparisons. No differences were found in regards to rs-fMRI data. In DTI data differences were noted in diffusivity measures (MD, RD, AD, FA) – both on global and nodal level. In general – clusteri[...]

Conclusion: Our study proved that diffusivity coefficients derived from the Diffusion Tensor Imaging are a more sensitive measure of the neural changes accompanying the pain relief in the chronic back pain than the resting state functional data. This finding stays in line with previous works (i.e. Hofstetter, 2[...]

Personal information: Patrycja Naumczyk University of Gdansk, Gdansk, POLAND mail: psypn@ug.edu.pl

References: Apkarian, AV, Hashmi, JA, Baliki, MN (2011). Pain and the brain: Specificity and plasticity of the brain in clinical chronic pain. Pain, 152, S49-S64.   Baliki MN, Geha PY, Fields HL, Apkarian AV. (2010). Predicting value of pain and analgesia: nucleus accumbens response to noxious stimuli chan[...]

C-1686

Validation of an age-adjusted D-dimer threshold for exclusion of pulmonary embolism in emergency department patients

D. Piątek, K. Sulkowska, D. Wójcik, M. Wiśniewska, M. Golebiowski; Warsaw/PL

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Aims and objectives: The current standard threshold of D-dimer in detecting pulmonary embolism (PE) in the whole population is 500 ng/ml [1]. However, D-dimer concentration increase with age, which leads to a low specificity of conventional D-dimer cut-off value in older patients - from approximately 51-63% in patients [...]

Methods and materials: Patient selection We enrolled 370 emergency department patients (W:M=212:158, average age 67 years) suspected of PE that underwent CT pulmonary angiography (CTPA) and D-dimer testing.   Characteristics of the study population are given in Table 1   CTPA technique   64-detector [...]

Results: In the whole population there was 77 cases of PE. Among 260 patients aged > 50 years (average age 76 years) there were 56 (21%) PE cases confirmed by CTPA. There was only one case of PE with D-dimer below 500 ng/ml. In patients with excluded PE there were 191 cases with D-dimer level higher than [...]

Conclusion: With the same sensitivity and twofold higher specificity age-adjusted D-dimer cut-off value can safely reduce unnecessary imaging in patients older than 50 years. Its application would reduce general population radiation exposure and decrease costs for emergency department. Moreover as older patient[...]

Personal information:

References: [1] Stein PD, Hull RD, Patel KC, Olson RE, Ghali WA, Brant R, et al. D-dimer for the exclusion of acute venous thrombosis and pulmonary embolism: a systematic review. Ann Intern Med 2004;140:589-602. [2] Schouten HJ, Geersing GJ, Koek HL et al. Diagnostic accuracy of conventional or age adjusted D-d[...]

C-1789

Imaging features of medulloblastoma in children

J. Sarnecki1, M. Zdun1, M. Łastowska1, W. Grajkowska1, M. Perek-Polnik1, E. Jurkiewicz2; 1 Warszawa/PL 2 Warsaw/PL

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Learning objectives: To review basic information about medulloblastoma in children. To list the MRI and CT features of medulloblastomas. To discuss the differential diagnosis of posterior fossa tumors based on imaging findings. To present the current knowledge about the correlation between the imaging findings and the m[...]

Background: Medulloblastma (MB) is a highly malignant (WHO grade IV), primitive cerebellar tumor of neuroectodermal origin [1,2]. It is the most common malignant brain tumor in children and accounts for approximately 30-40% of childhood posterior fossa tumors [1,3]. Medulloblastoma has a moderate male sex predi[...]

Findings and procedure details: Imaging features in CT and MRI Medulloblastomas arise in the cerebellum and hence in imaging studies present as masses located in the posterior fossa (Fig. 1). Majority of tumors lie in the midline and involve cerebellar vermis or vermis and cerebellar hemisphere (Fig. 2 and 3); isolated involveme[...]

Conclusion: MRI and, to a much lesser extent, CT are useful tools in the diagnosis, staging and treatment planning of medulloblastomas, as well as in monitoring for the disease recurrence.

Personal information:

References: Kun LE, MacDonald S, Tarbell NJ. Tumors of the Posterior Fossa and the Spinal Canal. In: Halperin EC, Constine LS, Tarbell NJ, Kun LE (eds.). Pediatric Radiation Oncology, 5th edition, Williams and Wilkins, Philadelphia, 2011;53-84. Northcott PA, Korshunov A, Pfister SM, Taylor MD. The clinical impl[...]

C-1909

Scrotal ultrasound in infertile men

K. Skrobisz-Balandowska, K. Markiet, M. Studniarek; Gdansk/PL

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Aims and objectives: The aim of the study was to re-assess the value of ultrasound within the scrotum in patients diagnosed with or/and suspected of fertility. Male infertility can be diagnosed if pregnancy does not occur after a year of having unprotected intercourse. In approximately 50% of such couples, impaired sp[...]

Methods and materials: 314 patients of The Infertility Clinic have been evaluated in both grey-scale and color-doppler utrasonography in years 2010-2014 by an experienced urogenital radiologist.

Results: 81 patients presented with no visible changes in ultrasonography. In the remaining group of 233 patients we have observed: varicocele in 140 patients (44,59%); testicular cysts in 75 cases (23.88%); microcalcifications in 56 patients  (17,83%);  testicular hipotrophy in 30 patients (9,5[...]

Conclusion: Scrotal ultrasonography proves to remain a valuable method for diagnosing scrotal abnormalities in the infertile population. It allows detection of scrotal abnormalities, also those that are nonpalpable. The results present that scrotal abnormalities are over 70% in the infertile population.  I[...]

Personal information:

References: 1. Pierik F., Dohle G., van Muiswinkel J., et al. Is routine scrotal ultrasound advantageous in infertile men? J Urol 1999, 162:1618-1620 2. Pezzella A., Barbonetti A., Micillo A., et al. Ultrasonographic determination of caput epididymis diameter is strongly predictive of obstruction in the ge[...]

C-1983

CT-Angiography of intracranial aneurysms and arteriovenous malformations

P. Piotrowicz; Toruń/PL

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Learning objectives: The prime purpose of this poster is to demonstrate a wide range of intracranial vascular pathologies and to indicate how to distinguish them by using CTA. It also includes presentation of normal anatomy of cerebral arteries and most common anatomical variants. Pathophysiology of the formation of ane[...]

Background: Cerebral vessels might be visualized by various diagnostic techniques such us MRA, CTA, DSA or even US. To provide high quality images CTA method was chosen as it returns suitable results for comparison. This method also enables creation of three-dimensional models showing spatial relations between [...]

Findings and procedure details: 1. Anatomical basis 1.1 Classic anatomy of Circle of Willis  (Fig. 1)   1.1.1 Carotid part – anterior circulation C7 segments of both ICA A1 segments of both ACA Single AcomA 1.1.2 Vertebrobasilar part – posterior circulation Basilar artery P1 segments of both PCM Both PcomA (som[...]

Conclusion: Volumetric reconstructions accurately depict arterial pathology. Thus it facilitates and accelerates diagnostic process and allows to plan appropriate treatment. However, it is very important to analyze also thin cross-sections images, not to miss any micro aneurysms or other discreet vascular disor[...]

Personal information:

References: Diagnostic Imaging Brain / [edited by] Anne G. Osborn, Karen L. Salzman, A. James Barkovich. -- 2nd ed. ISBN 978-1-931884-72-3 Robbins Basic Pathology, Kumar, Cotran, Robbins, copyright for Polish edition by Elsevier Urban&Partner, Wrocalaw 2005, ISBN 978-83-89-581-92-1 Fundamentals of diagnosti[...]

C-2435

High-frequency ultrasound of the ankle.

C. M. Olchowy1, D. Soliński1, A. Niemczyk1, K. Niemczyk1, A. Zwoliński1, K. Cebulski1, A. Olchowy2, M. Łasecki1, U. Zaleska-Dorobisz1; 1 Wroclaw/PL 2 Wrocław/PL

Direct link to access the poster (click here)

Learning objectives: Learning objectives   1.       To produce highly detailed didactic images and anatomical schemes   2.       To present ‘ticks and tips’ helping to obtain highly diagnostic images and understand anatomy   3.     &n[...]

Background: The recent technological advances in software and hardware of ultrasound equipment have improved the possibilities of ultrasound in ankle assessment, and modern equipment allows an accurate depiction of anatomical structures. Most of the anatomical structures in this area are situated superficially,[...]

Findings and procedure details: Around the ankle joint there are numerous structures that can be visualized during the ultrasound examination. Usually the examination is focused on one or two of compartments (anterior, posterior, lateral , medial) based on clinical question/symptoms.     Knowledge of exact location of [...]

Conclusion: 1.        High-resolution ultrasound of the ankle is a safe, efficient, and cost-effective method in evaluation of ankle structures.   2.        Knowledge of anatomy is essential for scanning the ankle accurately and efficiently. [...]

Personal information: Corresponding author: Cyprian Olchowy  cyprian.olchowy@gmail.com   Feel free to reach authors in case of any comments and questions.

References: De Maeseneer, M., Marcelis, S., Jager, T., Shahabpour, M., Van Roy, P., Weaver, J., & Jacobson, J. A. (2009). Sonography of the normal ankle: a target approach using skeletal reference points. American Journal of Roentgenology, 192(2), 487-495.   Lee, S. J., Jacobson, J. A., Kim, [...]

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