Image Quality in Magnetic Resonance Cholangiopancreatography Exams: Study Between Açai Juice and a Manufactured Contrast Agent

Pinho, Katia Elisa Prus; Pinho, Antonio Carlos; Gewehr, Pedro Miguel; Gusso, Andreia Magri

doi:10.1007/978-981-13-2517-5_40

Cited by 2 publications

(13 citation statements)

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“…The images were acquired with a 1.5T MRI system [8] from General Electric Company (GE), model HDXT with 12 channels, GE Healthcare Advantage workstation running Centricity DICOM (Digital Imaging and Communications in Medicine) Viewer version 3.0 software, and were saved in the filing system and communicating images (PACS-Picture Archiving and Communication System) [19], in a clinic of Curitiba city (Brazil). The usual MRCP acquisition protocol was used: localizer (LOC) in 3 orthogonal planes (PL) following single-shot (SS), fast spin echo (FSE) in apnea (LOC 3 PL SSFSE Apnea); radial colangio [9,20] and axial lava T1 without fat [ 21] for the two days of exams.…”

Section: Mrcp Exam Protocolmentioning

confidence: 99%

“…The study was approved by the Ethics Committee of Federal University of Technology-Paraná (UTFPR) by number 02.520.512.0.00005547 and a free and informed consent form (ICF) was released. Patients who agreed to participate received the ICF and appropriate guidance on the MRI examination [8].…”

Section: Patient Selectionmentioning

confidence: 99%

“…In general, the contrast agent should: contain ferromagnetic substances such as iron (Fe) [5] and, change the recovery and decline times (T1 and T2, respectively) [4,6]. Several natural contrasts have been used in MRCP exams including orange, lemon, pineapple, blueberry and, açai juices [3,4,7,8]. One of the most promising natural agents is açai since good results were obtained in tests (in vitro) on magnetic resonance imaging for various T1 and T2 weighting sequences [9].…”

Section: Introductionmentioning

confidence: 99%

“…One of the most promising natural agents is açai since good results were obtained in tests (in vitro) on magnetic resonance imaging for various T1 and T2 weighting sequences [9]. Among the advantages of a natural agent, it does not cause adverse reactions and is more palatable [8] than manufactured agents. In clinical terms, to be successful in MRCP exams, a juice must reduce signal strength between stomach and duodenum, being able to produce a medical report with diagnostic quality.…”

Section: Introductionmentioning

confidence: 99%

“…Since there is a great amount of subjectivity on the assessment of the acquired images by medical teams, depending on the previous experience of each evaluator, there is an opportunity to explore the use of Image J free software [13,14] in order to produce a new quantitative analysis of the images and to compare them to medical evaluation. Thus, the main objective of this study was to assess quality of MRCP images, obtained with the administration of the promising açai juice [8,15] and a manufactured iron oxide-based Brazilian Archives of Biology and Technology. Vol.62: e19160697, 2019-www.scielo.br/babt contrast employed as negative oral contrast agents, by means of medical evaluation and with the use of Image J software [14].…”

Section: Introductionmentioning

confidence: 99%

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Açai juice as contrast agent in MRCP exams: qualitative and quantitative image evaluation

Pinho

Pisani

et al. 2019

Braz. arch. biol. technol.

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This works aims to assess images obtained with administration of açai juice as compared to a manufactured standard iron oxide-based contrast employed as negative oral agents in Magnetic Resonance Cholangiopancreatography (MRCP), employing qualitative and quantitative evaluation. The research was developed with 64 patients submitted to MRCP exams (on 2 days) in a clinic of Curitiba city (Brazil). First (day 1), a manufactured iron oxide-based contrast (A) was offered and later (day 2), açai juice (contrast B) was given to patients. Radiologists (R1 and R2) evaluated the images, classifying them by a score (1-4). In order to have a quantitative assessment, Image J free software was employed generating plots of gray levels against distance of a chosen area of the bile duct interest region. Evaluating images for contrast A, R1 furnished an average score of 3.52 and R2 of 3.27. For contrast B, R1 provided 3.44 and R2 3.38. Both evaluators considered image quality with contrast A adequate for 62 patients. R1 considered adequate for 62 and R2 for 60 patients when using açai juice. By taking same images for all patients with Image J, a quantitative analysis was obtained, resulting correlation coefficient of 0.986 between average curves of contrasts A and B. Thus, açai juice is an adequate alternative as contrast agent in MRCP exams. Image J was employed as a new method for quantitative investigation of image quality, presenting good agreement with medical opinion.

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Section: Mrcp Exam Protocolmentioning

confidence: 99%

Section: Patient Selectionmentioning

confidence: 99%