Hitachi

dynamic Contrast Harmonic Imaging (dCHI)

Sensitive, high-performance imaging

Low MI contrast specific imaging technology developed for use in conjunction with ultrasound contrast agents is given a S/N boost on the Hitachi HI VISION platforms where low noise amplification at the front end gives significantly improved signal sensitivity

 

Hitachi offers a choice of contrast specific modes that can be used with multiple transducers to support you with the optimal tool for the next clinical diagnostic challenge or to monitor post-interventional workup:

Hitachi's Wideband Pulse Inversion Contrast Harmonic Imaging (dCHI-W) allows the modulation of the phase and transmitted frequency range between pulses. Advantages include significantly improved lateral and contrast resolution, without compromising axial resolution. Frequency modulation provides greater sensitivity at depth, compared with conventional harmonic imaging.

Colour Wideband Pulse Inversion (CWPI) mode offers additional contrast to tissue signal sensitivity with a choice of displays: contrast enhancement only, contrast enhancement as a colour overlay of the fundamental low MI image 

Motion-Compensated Microbubble Trace Imaging (MC-MTI)

MC-MTI is an accumulation mode that provides extremely detailed micro-vessel morphology visualisation, offering the potential for improved tumour characterisation. Intermittent or manual flash-replenishment sequences can be customised for each examination.

Time Intensity Curves

Time Intensity Curves (TIC) incorporating Inflow-time Mapping (ITM)* can be generated from stored clips and used to display the pattern of signal enhancement with time after injection, offering improved tumour characterisation and potential for monitoring treatment response. Within multiple selectable ROIs, parameters such as time-to-peak and amplitude of enhancement, can be derived using a best-fit analysis - and all data can be exported to an Excel file for further off-line analysis.

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Using the Inflow-time Mapping quantification and TIC display the earlier arrival of the contrast agent in the small liver lesion (red ROI) is displayed
Here the Inflow-time Mapping parametric display shows the later arrival of contrast agent in the peripheral zone of the prostate

 

*HI VISION Ascendus only

 

 

Clinical Examples:

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Renal angiomyolipoma - The angiomyolipoma extending from the lower pole of the kidney shows similar enhancement to the rest of the renal parenchyma. The MC-MTI mode is activated 22 seconds after injection to better delineate the enhancement
Splenic hamartoma – typical patchy uptake is seen in the early stages of contrast enhancement in the spleen, whilst the splenic hamartoma is well delineated as a hypo-enhanced area in the upper pole

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Liver metastasis – some early uptake followed by rapid wash out is seen in this very small liver metastasis
Prostate gland –the CWPI mode with excellent tissue noise rejection demonstrates the later arrival of contrast enhancement in the peripheral zone of the prostate

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Colitis – The CWPI mode in conjunction with MC-MTI shows excellent enhancement in the thickened bowel wall