Diagnostic Imaging

Boylan, Shane M.; Mylniczenko, Natalie D.; Gobien, Rolf P.

doi:10.1002/9781119259886.ch8

Cited by 3 publications

(11 citation statements)

References 36 publications

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“…CT can detect mineralization problems (deformities) in the skeletal system of fish, disorders of the swim bladder and another organ, or gastrointestinal diseases such as tumours and foreign bodies. Swim bladder diseases, like parasitic infections, are also detectable through CT scans (Boylan et al., 2021; Székely et al., 2004). The ante‐mortem and post‐mortem CT examinations are well utilized in morphometric investigations and are more often applied to diagnose fish diseases as well (Boylan et al., 2021; Weinhardt et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Swim bladder diseases, like parasitic infections, are also detectable through CT scans (Boylan et al., 2021; Székely et al., 2004). The ante‐mortem and post‐mortem CT examinations are well utilized in morphometric investigations and are more often applied to diagnose fish diseases as well (Boylan et al., 2021; Weinhardt et al., 2018). Using contrast material can improve the image quality of the tissues (Brust et al., 2021; Weinhardt et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Using contrast material can improve the image quality of the tissues (Brust et al., 2021; Weinhardt et al., 2018). Fish should be sedated for such ante‐mortem investigations, they must be kept wet, and anaesthesia ought to be maintained during the entire procedure (Boylan et al., 2021). Positive reinforcement training or tonic immobility can also be good options for diagnostic imaging techniques in some species (Boylan et al., 2021; Brust et al., 2021; Hoitsy et al., 2017; Weinhardt et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Fish should be sedated for such ante‐mortem investigations, they must be kept wet, and anaesthesia ought to be maintained during the entire procedure (Boylan et al., 2021). Positive reinforcement training or tonic immobility can also be good options for diagnostic imaging techniques in some species (Boylan et al., 2021; Brust et al., 2021; Hoitsy et al., 2017; Weinhardt et al., 2018). The MRI technique works with a different method to the aforementioned CT; it uses radio waves and magnetic fields to create images.…”

Section: Introductionmentioning

confidence: 99%

“…The MRI technique works with a different method to the aforementioned CT; it uses radio waves and magnetic fields to create images. This equipment provides greater soft tissue contrast than the earlier mentioned modalities (Boylan et al., 2021; Roberts, 2011; Rogers et al., 2008). The disadvantage is solely the long duration of the examination and the high cost of the machine (Boylan et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Rainbow trout (Oncorhynchus mykiss, Walbaum 1792) adenocarcinoma investigation with various diagnostic imaging techniques

Hoitsy,

Gál

et al. 2024

Journal of Fish Diseases

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Diagnostic imaging techniques provide a new aspect of the ante‐mortem and post‐mortem diagnostics in fish medicine. Ultrasonography, computed tomography (CT) and magnetic resonance imaging (MRI) can provide more information about the internal organs and pathognomic lesions. The authors used diagnostic imaging techniques to evaluate and describe the neoplastic malformation in a 3‐year‐old female rainbow trout (Oncorhynchus mykiss). The fish was examined with Siemens Somatom Definition AS + CT scanner and Siemens Biograph mMR scanner. The animal was lethargic and showed anorectic signs and muscular dystrophy. During the post‐mortem investigation, histopathology and immunohistochemistry were also performed allowing us to identify the neoplasms. The results showed a large soft tissue mass in the first mid‐intestine segment, which proved to be an adenocarcinoma. This subsequently led to digestion problems and absorption disorders. Immunohistochemically, neoplastic cells of carcinoma revealed E‐cadherin and pancytokeratin positivity. This is the first study to report the use of MRI and CT for studying gastrointestinal adenocarcinoma in rainbow trout.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Rainbow trout (Oncorhynchus mykiss, Walbaum 1792) adenocarcinoma investigation with various diagnostic imaging techniques

Hoitsy,

Gál

et al. 2024

Journal of Fish Diseases

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Long‐term effects of iopamidol as a contrast medium for computed tomography in Cloudy Catsharks Scyliorhinus torazame

Ito,

Furuya,

Tanaka

et al. 2024

J Aqua Anim Hlth

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ObjectiveThe use of computed tomography (CT) in aquarium animals, including elasmobranchs, has increased dramatically. To take advantage of CT, contrast medium is used to enhance internal organs and provide contrast since elasmobranchs lack visceral fat. In this study, the contrast effects of iopamidol were examined for up to 260 days after intravenous administration to establish the time course of the CT values for the target organs in eight mature Cloudy Catsharks Scyliorhinus torazame.MethodsA micro‐CT system was used to measure the CT values of the designated region of interest in the target organs (ventricular cavity, kidneys, liver, gallbladder, ovarian follicles, uterine horn cavity) over time and the eggs laid, following administration of iopamidol (700 mg of iodine/kg).ResultThe CT values of the ventricular cavity and kidneys peaked at 30 min and showed low values after day 22. The CT values for the liver increased over time and peaked at day 200, whereas values for the gallbladder and ovarian follicles peaked on day 6, with the gallbladder showing a low value and the ovarian follicles still showing a high value on day 260. Computed tomography images with identifiable enhancement within bilateral uterine horns were followed from days 1 to 35. The mean and maximum CT values of yolk and jelly in eggs laid after day 30 were significantly higher than the values for eggs laid up to day 29; embryonic development was confirmed in 88.7% of the eggs.ConclusionThere was no mortality or morbidity of the sharks during the experiment, indicating that the administration of iopamidol at 700 mg of iodine/kg did not result in any adverse effects for 260 days. This is the first study to describe the long‐term contrast effects of iopamidol, thus contributing new information about the application of contrast studies in Cloudy Catsharks.

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Scale‐based landmark for internal organs assessments of common carp (Cyprinus carpio) during digital radiography and ultrasonography imaging

Anfara,

Rahmiati,

Ulum

2024

Anat Histol Embryol

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Medical imaging techniques such as digital radiography and ultrasonography are non‐invasive and provide precise results for examining internal organs and structures within fish. Their effectiveness can be further enhanced by using body parts like scales as markers for the organs beneath them. This study utilized the number of scales as landmarks in digital radiography and ultrasonography to non‐invasively evaluate the muscles, bones, and images of internal and reproductive organs of common carp (Cyprinus carpio). Digital radiography was performed in the dorsoventral and lateral views of the fish, whereas ultrasonography was conducted in longitudinal and transverse views on sequence scale numbers with brightness and colour Doppler‐modes. Digital radiography of the common carp revealed the whole‐body morphology, including the bony parts from the head, pectoral fins, dorsal fins, pelvic fins, anal fins, and vertebrae to the tail that appeared radiopaque. Internal organs were also observed, with the swim bladder and heart appeared radiolucent, while the intestines, liver, testes, and ovaries appeared radiopaque. Ultrasonography in brightness mode displayed the digestive organs, reproductive organs, and muscle thickness. Additionally, colour Doppler mode demonstrated blood flow within the heart's ventricle.

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Diagnostic Imaging

Cited by 3 publications

References 36 publications

Rainbow trout (Oncorhynchus mykiss, Walbaum 1792) adenocarcinoma investigation with various diagnostic imaging techniques

Rainbow trout (Oncorhynchus mykiss, Walbaum 1792) adenocarcinoma investigation with various diagnostic imaging techniques

Long‐term effects of iopamidol as a contrast medium for computed tomography in Cloudy Catsharks Scyliorhinus torazame

Scale‐based landmark for internal organs assessments of common carp (Cyprinus carpio) during digital radiography and ultrasonography imaging

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