Temat: Ultrasound - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: The value of imaging techniques in the staging of pancreatic cancer
Autorzy:: Kulig, Jan
Kołodziejczyk, Piotr
Kłęk, Stanisław
Popiela, Tadeusz
Zając, Aleksander
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 2.

Tytuł:: Multimodal Ultrasonic Imaging for Breast Cancer Detection
Autorzy:: Camacho, J.
Medina, L.
Cruza, J. F.
Moreno, J. M.
Fritsch, C.
Tematy:: ultrasound imaging
ultrasound tomography
breast cancer; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/176695.pdf Link otwiera się w nowym oknie
Opis:: Ultrasound is used for breast cancer detection as a technique complementary to mammography, the standard screening method. Current practice is based on reflectivity images obtained with conventional instruments by an operator who positions the ultrasonic transducer by hand over the patient’s body. It is a non-ionizing radiation, pain-free and not expensive technique that provides a higher contrast than mammography to discriminate among fluid-filled cysts and solid masses, especially for dense breast tissue. However, results are quite dependent on the operator’s skills, images are difficult to reproduce, and state-of-the-art instruments have a limited resolution and contrast to show micro-calcifications and to discriminate between lesions and the surrounding tissue. In spite of their advantages, these factors have precluded the use of ultrasound for screening. This work approaches the ultrasound-based early detection of breast cancer with a different concept. A ring array with many elements to cover 360. around a hanging breast allows obtaining repeatable and operator-independent coronal slice images. Such an arrangement is well suited for multi-modal imaging that includes reflectivity, compounded, tomography, and phase coherence images for increased specificity in breast cancer detection. Preliminary work carried out with a mechanical emulation of the ring array and a standard breast phantom shows a high resolution and contrast, with an artifact-free capability provided by phase coherence processing.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Usefulness of 3D transperineal ultrasound in severe stenosis of the anal canal : preliminary experience in four cases
Autorzy:: Santoro, G.A.
Szopiński, Tomasz
Sudoł-Szopińska, I.
Kołodziejczyk, M.
Słapa, R. Z.
Opis:: Background Organic or functional anal canal stenoses are uncommon conditions that occur in the majority of cases as a consequence of anal diseases. A proper assessment is fundamental for decision making; however, proctological examination and endoanal ultrasound are often unfeasible or very difficult to perform even under local or general anesthesia. We therefore began to use 3D transperineal ultrasound to assess patients. The aim of this study was to compare the results of evacuation proctography and 3D transperineal ultrasound in patients with severe anal canal stenosis. Methods Four consecutive patients with high-grade anal canal stenosis were evaluated using both proctography and 3D transperineal ultrasound with a micro-convex transducer between March and June 2011.Results In all cases, 3D transperineal ultrasound provided detailed information on the length and level of stenosis and on the integrity of the anal sphincters. Conclusions Our preliminary experience suggests that 3D transperineal ultrasound makes it possible to plan optimal surgical treatment.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 4.

Tytuł:: The influence of the transducer bandwidth and double pulse transmission on the encoded imaging ultrasound
Autorzy:: Trots, I.
Nowicki, A.
Lewandowski, M.
Secomski, W.
Litniewski, J.
Tematy:: encoded imaging ultrasound
ultrasound imaging transducer
CGS; Pokaż więcej
Wydawca:: Polskie Towarzystwo Akustyczne
Powiązania:: https://bibliotekanauki.pl/articles/331651.pdf Link otwiera się w nowym oknie
Opis:: An influence effect of fractional bandwidth of ultrasound imaging transducer on the gain of compressed echo signal being the complementary Golay sequences (CGS) with different spectral widths is studied in this paper. Also, a new composing transmission method of CGS is discussed together with compression technique applied in order to increase the signal-to-noise ratio (SNR) and penetration. The CGS with two different bit lengths, one-cycle and two-cycles are investigated. Two transducers with fractional bandwidth of 25% and 80% at centre frequency 6 MHz are used. The experimental results are presented, clearly proofing that increasing of the code length leads to compressed echo amplitude enhancement. The smaller the bandwidth is the larger is this effect; the pulse-echo sensitivity of the echo amplitude increases by 1.88 for 25% fractional bandwidth and 1.47 for 80% while preserving time resolution. The presented results of double transmission of short codes show the penetration and SNR improvement while maintaining dead zone.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Comparative efficacy of contrast-enhanced ultrasound versus B-mode ultrasound in the diagnosis and monitoring of hepatic abscesses
Autorzy:: Dobek, Adam
Fabisiak, Adam
Białek, Piotr
Grząsiak, Oliwia
Kosztowny, Konrad
Ciesielski, Wojciech
Kobierecki, Mateusz
Stefańczyk, Ludomir
Opis:: Purpose: This study aimed to evaluate the diagnostic value of contrast-enhanced ultrasound (CEUS) in diagnosing and monitoring hepatic abscesses (HA). Material and methods: This retrospective study included 29 patients (9 females, 20 males) with 64 HA. Computed tomography (CT) served as the diagnostic benchmark, compared with CEUS and B-mode ultrasound (B-mode). Two radiologists assessed the presence, size, and characteristics of the HA. Results: The contrast enhancement pattern on CEUS matched post-contrast CT. Lesion size detected by CEUS ranged from 1.16 cm to 15.33 cm (median 5.74 cm). CT classified lesions into four types: I (tumor-like) – 2, II (honeycomb) – 5, III (lacunar) – 23, IV (cystic-like) – 34. CEUS fully agreed with these classifications. B-mode missed two type I lesions. For type III abscesses, agreement with CEUS was perfect (κ = 1, 100%), and moderate with B-mode (κ = 0.50, 79.7%). For type IV abscesses, agreement with CEUS was perfect (κ = 1, 100%), and high with B-mode (κ = 0.88, 93.75%). Pus enhancement remained stable (± 15 dB), while the abscess pouch background varied (± 11 dB to ± 6 dB). The Mann-Whitney U test confirmed these observations (arterial: p = 1.02e-14, portal: p = 3.79e-12, late venous: p = 4.53e-13). No significant difference in enhancement values was found based on abscess size (> 4 cm vs. < 4 cm). Conclusions: CEUS is superior to B-mode for diagnosing and monitoring HA, offering clearer views of the abscess pouch, septa, and liver parenchyma. The purulent part lacks contrast, allowing accurate assessment. CEUS can replace CT for monitoring and aid in patient selection for percutaneous intervention.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 6.

Tytuł:: Preoperative localisation of parathyroid adenomas using ultrasound-guided methylene blue dye injection
Autorzy:: Harraz, Mohamed M.
Tawfik, Ahmed Ibrahim
Abouissa, Ahmed H.
Eltantawy, Amir Monir
Opis:: Purpose: Primary hyperparathyroidism is mainly caused by parathyroid adenomas. Preoperative imaging can be performed using different imaging modalities, e.g. ultrasound (US), radionuclide scanning, magnetic resonance imaging, and computed tomography, often used in combination. Currently, US-guided blue dyes, especially methylene blue (MB) injection, are used to identify parathyroid tumours. Material and methods: This was a retrospective study of 228 patients. Preoperative ultrasound, scintigraphy, and biochemistry were performed on all patients, and fine-needle aspiration procedures were performed on suspected patients. Using preoperative US-G injection with MB dye, target tumours were injected in all cases. Results: A total of 163 patients were female and 65 were male. The mean age was 42.5 years. US was positive in 203 (89%) cases, 25 (11%) were negative, and all had a positive sestamibi scan (100%). US-G needle injections with MB dye of target tumours were successful in all cases. The average diameter of the lesions was 18 mm. All had positive intraoperative identification of parathyroid adenoma and MB staining (100% accuracy, 100% sensitivity, and 100% specificity). Operating time (min ± SD) was 22.7 ± 11.5 minutes, and the success rate was 100%. All were parathyroid adenomas histologically. Intraoperative parathormone hormone decreased in all patients. In postoperative follow-up, all were normocalcaemic with no local or systemic complications. Conclusions: Localisation of small parathyroid adenomas by US-guided blue dye injection is a safe, simple, and useful tool when performing parathyroidectomy with no complications.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 7.

Tytuł:: Numerical model for analysis of spatial characteristics of ultrasound heads
Autorzy:: Szpakowski, A.
Pustelny, T.
Ochocki, M.
Tematy:: ultrasound head
acoustics; Pokaż więcej
Wydawca:: Polskie Towarzystwo Akustyczne
Powiązania:: https://bibliotekanauki.pl/articles/332278.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the physical base of the numerical system for analysis and modelling acoustic fields generated by an acoustic head of arbitrary construction. The elaborated system allows to analyse the sending-receiving multielements ultrasound heads. In the paper modeling of the acoustic system as the linear one was proposed. Numerical model, its implementation and preliminary results was presented.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Standards for musculoskeletal ultrasound
Standardy badań ultrasonograficznych układu mięśniowo-szkieletowego
Autorzy:: Czyrny, Zbigniew
Tematy:: MSK
standards
ultrasound; Pokaż więcej
Wydawca:: Medical Communications
Powiązania:: https://bibliotekanauki.pl/articles/1033390.pdf Link otwiera się w nowym oknie
Opis:: Ultrasound has become the primary diagnostic tool in traumatic, inflammatory and degenerative soft tissue conditions. It is also used to monitor the condition of joints, ligaments, cartilage and muscles. Its widespread availability as well as cases of unsatisfactory quality of equipment and the lack of appropriate training of ultrasound examiners are reasons why standards need to be set for equipment requirements, the scope of ultrasound assessment and examiner’s experience. The paper discusses ultrasound criteria that are common for many specialties as well as detailed criteria for the examined regions and structures along with their description. The aim of the paper is to harmonize the protocol for ultrasound examination in all ultrasound laboratories.
Badania ultrasonograficzne stały się podstawową metodą diagnostyczną w chorobach tkanek miękkich, zarówno pourazowych, jak i zapalnych czy zwyrodnieniowych. Służą do monitorowania stanu stawów, więzadeł, chrząstek czy mięśni. Ich powszechna dostępność oraz przypadki niezadowalającej jakości sprzętu i braku odpowiedniego wyszkolenia osób przeprowadzających badanie to powody, dla których istnieje konieczność określenia standardów dotyczących wymagań aparaturowych, zakresu badania oraz doświadczenia lekarzy wykonujących badanie. W opracowaniu omówiono ogólne kryteria badania ultrasonograficznego, wspólne dla wielu specjalności, a także kryteria szczegółowe, dotyczące badanych okolic i struktur, wraz z ich opisem. Celem pracy jest ujednolicenie protokołu badania we wszystkich pracowniach ultrasonograficznych. Artykuł w wersji polskojęzycznej jest dostępny na stronie http://jultrason.pl/index.php/wydawnictwa/volume-17-no-70
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Breasts cysts in adolescents : diagnosis, monitoring, treatment
Autorzy:: Jakubowska, Anna
Grajewska-Ferens, Magdalena
Brzewski, Michał
Opis:: Background: The aim of the paper was the US evaluation of hormonal disorders and treatment results in adolescent girls and boys with breast cysts. Material/Methods: In the years 2001–2009, US examination of the breast was performed in 427 children aged 10–18 years, with clinically suspected breast pathologies. The indications for US examination typically included pain, breast swelling and a palpable tumor. The US examination was performed using a 7–12 MHz linear transducer. Results: Breast cysts were found in 42 children: 36 adolescent girls and 6 boys with gynecomastia. Infected cysts were found in 35 children. The cysts ranged in size from 5 mm to 30 mm. In 5 of the girls, large cysts were treated by an incision and drainage, and in all the children with infected cysts, antibiotic therapy was used. Hormonal disorders were found in 30 girls. A follow-up examination was performed, and the observation time varied from 1/12 to 2 years. The cysts disappeared completely in 30 children. Hormonal therapy was introduced in 5 girls. Conclusions: Breast cysts found in US examinations are indications for check-up examinations including endocrinological diagnostics and, if the cyst is persistent, possibly for hormonal treatment.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 10.

Tytuł:: Naczyniak limfatyczny moszny i przestrzeni zaotrzewnowej u 12-letniego chłopca : opis przypadku
Scrotal and retroperitoneal lymphangioma of a 12-year-old boy : case report
Autorzy:: Koltowska, Anna
Zaleska-Dorobisz, Urszula
Moroń, Krzysztof
Jaworski, Wojciech
Opis:: Background: Lymphangiomas occurs in children quite frequently. They are most commonly localized in the head, neck, axilla, chest, abdomen, and retroperitoneum. Lymphangiomas of the scrotum are very rare and are usually clinically silent, so they are a challenge for radiologists performing US examination in children. They are obliged to differentiate the following lesions: torsion of the testicle, scrotal hernia, hydrocoele, and epididymal cyst, in addition to the masses of primary extratesticular localization such as hemagioma, congenital vascular malformations, fibromas, and malignant tumors. Additional difficulties appear in boys who present acute scrotum syndrome. Case Report: The paper reports the diagnostics and treatment of a huge multicystic lymphangioma situated in the scrotum and retroperitoneum of a 12-year-old boy who had fallen from a bicycle and presented acute scrotum. The lesion of the scrotum was surgically excised. Retroperitoneal lymphangioma was detected during this operation. Subsequent diagnostics was based on ultrasonography, computerized tomography, and magnetic resonance imaging of the abdominal cavity. The lymphangioma of the retroperitoneum was resected. The patient shows no evidence of recurrence after 7 years. Conclusions: Cystic lymphangiomas are rare but benign intrascrotal, extratesticular, painless masses in children. They are sonographically multicystic or multiloculated abnormalities and may show infiltrative extension to the perineum, retroperitoneum, or abdomen. Recognition of this entity and its extent is important for correct clinical management and may be for planning treatment.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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