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Home >> Products >> Low Dose >> Low Dose Solution of X-ray >> Fluoroscopy

Low Dose (Low Dose Solution of X-ray [Fluoroscopy])



Spot Fluoroscopy

Toshiba Medical's Unique Dose Reduction Advantage

Dramatically Reducing X-Ray Dose to Both Patients and Staff

What is Spot Fluoroscopy?

  • Spot Fluoroscopy is a unique Toshiba Medical feature that substantially reduces the area exposed to fluoros-copy during interventional procedures.
  • All Infinix™-i systems incorporate a dose area product (DAP*) meter to display and record the total patient dose. The DAP can be dramatically reduced by selecting Spot Fluoroscopy mode.
  • The area exposed to X-rays is an important factor in determining the total patient dose.

*: (DAP is an optional item depending on country.)

Normal Fluoroscopy / Spot Fluoroscopy Area / Spot Fluoroscopy Display

  • Toshiba Medical's Spot Fluoroscopy is a unique dose reduction technology for minimizing the fluoroscopic dose.
  • Spot Fluoroscopy allows fluoroscopy to be performed within an ROI while holding the last image outside the ROI. This function reduces the patient input dose area and the scatter dose to the clinicians, and is particularly useful in applications requiring prolonged fluoroscopy.
  • Spot Fluoroscopy is a unique Toshiba Medical feature with freely adjustable ROI sizes and a collimator that allows asymmetric collimation for off-center fluoroscopy.

Both 20 cm² FOV

Where can Spot Fluoroscopy be used?

  • Spot Fluoroscopy permits multiple targeted fluoroscopic areas to be selected while performing complex interventional procedures, without the need to expose the entire field of view.
  • Spot Fluoroscopy allows great flexibility in the system layout for any procedures in which targeted fluoroscopy needs to be performed without moving the C-arm, table, or patient.
  • Spot Fluoroscopy is useful in a wide range of procedures such as interventional EP ablation and neurological, pediatric, and general vascular studies.

● Easy steps for selecting and using Spot Fluoroscopy

Easy steps for selecting and using Spot Fluoroscopy

● Examples of Spot Fluoroscopy

Toshiba Medical's exclusive Spot Fluoroscopy enables clinicians control and freedom to select three different region of interest (ROI) live fluoroscopy sizes or freely place and size the ROI anywhere over the LIH. This enables greater procedure efficiency, increases the amount of image information and reduces dose. A series of controlled radiation measurements were performed in Toshiba laboratories using a 20 cm aryilic phantom. The results are shared in the information below.

Benefit. Spot Fluoroscopy can be used to reduce the DAP (Dose Area Product).

The graph on the right shows the cumulative DAP (Dose Area product) measured on the three selectable live fluoroscopy ROI sizes. This is defined as the patient exposure dose. If the cumulative dose for normal field size is defined as 100%, Spot Fluoroscopy can reduce the dose by more than 50%, significantly decreasing the risk to the patient.

The ability to minimize the area dose has an additional benefit. As the illustration on the right shows, when exposure from different angles is required, Spot Fluoroscopy can greatly reduce the overlap between each exposure, saving the patient from unnecessary exposure.

DAP (Dose Area product)

Benefit. Lower levels of scatter radiation reduce exposure for the patient, clinician, and staff.

The graph on the right shows cumulative scatter radiation. In addition to the patient, this exposure affects clinical staff. The result shows that Spot Fluoroscopy can dramatically reduce scatter radiation by more than 50%.

As the above graphs and information show, limiting the exposure field by simple operation of Spot Fluoroscopy reduces unnecessary exposure. Toshiba Medical's unique Spot Fluoroscopy enables interventionalists action while providing a true dose-reduction technology to help protect the patient and clinical staff in the examination room.

Scatter radiation

Variable dose mode

With the joystick on the tableside console, the clinician can choose from four preprogrammed fluoroscopy modes. Different combinations of pulse rates, dose levels, and image processing parameters optimize dose rates and image quality for various study protocols.

For example, there is a special protocol optimized for EP ablation procedures or other examinations requiring prolonged fluoroscopy. Compared to conventional protocols for EP ablation, the special setting can reduce cumulative dose by more than 62%.

Variable dose mode

Auto beam filter

Automatic selection of up to five beam filters based on calculated patient thickness and SID information provides improved optimization of dose and image quality for each clinical case.

Auto beam filter

Live zoom

Live zoom digitally enlarges images in real time up to 2.4 times at lower doses than traditional FOV changes. This eliminates the need to use smaller fields of view on the detector for magnification purposes (which would increase the required dose).
With the live zoom, the dose can be reduced by up to 30% or more compared to that of FOV (field of view) switching.

Dose Ration: FOV zoom vs. Live Zoom

Fluoroscopic image acquisition

The enhanced fluoroscopic images provided by SNRF allow the clinician to avoid unnecessary cine (DA) exposure.
The clinician can choose fluoroscopic acquisition in the same manner as DA acquisition, allowing the patient X-ray dose to be reduced.

Fluoroscopic image with "SNRF"

Fluoroscopic image with 'SNRF'

The SNRF provides significant horse reduction while maintaining high temporal resolution.

Unique fluoroscopic image recording procedures

Various recording modes are available for high-quality fluoroscopic images acquired with the SNRF.
These acquisition techniques can be operated simply by pressing the footswitch. The clinician can choose fluoroscopic acquisition in the same manner as DA acquisition, allowing the patient X-ray dose to be reduced.


Fluoroscopic images acquired after pressing the fluoroscopy start button are recorded. Images can be recorded for up to 90 seconds or 1020 frames. (Dynamic image recording)

Fluoroscopic images acquired in the last 60 seconds (max.) are recorded. Press the F-STORE button after fluoroscopy is completed to save the run as part of the patient file. (Dynamic image recording)
The LIH (last image hold) image acquired in fluoroscopy is recorded.
(Still image recording)

Significant contribution to minimizing dose

The graph on the right compares the cumulative air kerma measured for cardiac catheterization procedures with and without SNRF as measured on over 400 clinical cases.
The fluoroscopy/radiography frame rate (fps) and fluoroscopy time were similar, but the result shows a significant decrease in the cumulative dose.
SNRF combined with simple fluoroscopic recording techniques have been proven effective and have reduced cumulative procedure dose by more than 50%.

Average cumulative procedure dose

Low rate pulsed fluoroscopy

The noise less and less lag image provided by SNRF allows clinicians to work with lower pulsed rate fluoroscopy, while contributes to reduce total case dose.

Low rate pulsed fluoroscopy