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This software is designed to be used in combination with the Toshiba GMS-5500A/UI Nuclear Medicine Medical Image Processor. The software matches the position and size of two tomographic images acquired for the brain of the same patient and superimposes them for display. Nuclear medicine, CT, and MRI images can be processed using this software. This software can be used to perform registration between images of two different modalities and superimpose them. This device employs no intended uses that are not in cleared devices already found in the marketplace.

To detect or image the distribution of radionuclides in the body or organ, using the following technique(s).
Tomographic Imaging (SPECT) for non Positron Emitter

The Automatic Image Registration Software, Model NSFU-050A is a software option for the Toshiba GMS-5500A/UI Nuclear Medical Image Processor. The software matches the position and size of two tomographic images acquired for the same patient and superimposes them for display.

The provided 510(k) summary for the Toshiba Automatic Image Registration Software, Model NSFU-050A, does not contain detailed information about acceptance criteria, specific device performance metrics, or study methodologies that would allow for a comprehensive breakdown as requested. This document is a premarket notification for substantial equivalence, which primarily focuses on comparing the new device to legally marketed predicate devices based on intended use and technological characteristics rather than providing in-depth performance study results.

However, based on the absence of such information in this specific 510(k), we can infer several points relevant to your questions.

Here's an analysis of what can be extracted and what information is missing:

1. Table of Acceptance Criteria and Reported Device Performance

2. Sample Size Used for the Test Set and Data Provenance

• Sample Size: Not specified. The 510(k) summary does not mention any specific test set or the number of cases/patients used to evaluate the device's performance.
• Data Provenance: Not specified. There is no information regarding the country of origin of data or whether any testing was retrospective or prospective.

3. Number of Experts Used to Establish Ground Truth for the Test Set and Qualifications

• Number of Experts: Not specified.
• Qualifications of Experts: Not specified. The summary does not provide any details about experts or how ground truth was established for any performance testing.

4. Adjudication Method for the Test Set

• Adjudication Method: Not specified. Since no test set or ground truth establishment is described, no adjudication method is mentioned.

5. Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study

• MRMC Study: Not reported. The 510(k) summary does not mention any MRMC study or any comparison of human reader performance with or without AI assistance. This type of study would typically involve a human-in-the-loop component, which is not a focus of the provided summary for this image registration software.

6. Standalone (Algorithm Only) Performance Study

• Standalone Study: Not explicitly described as a formal study. While the device itself is a standalone software component, the 510(k) summary does not present specific performance metrics from a standalone study. It focuses on the device's function (matching and superimposing images) and its substantial equivalence to predicate devices, implying its ability to perform this function, but without quantitative evidence for this specific submission.

7. Type of Ground Truth Used

• Type of Ground Truth: Not specified. There is no indication of whether expert consensus, pathology, outcomes data, or any other method was used to establish ground truth for testing.

8. Sample Size for the Training Set

• Sample Size: Not specified. The 510(k) summary does not provide any information about a training set, suggesting that the submission does not rely on a machine learning model that requires a dedicated training set in the modern sense. Given the 1999 date, this is consistent with software development practices of that era, where rule-based or algorithmic approaches were more common and typically didn't involve "training sets" in the current AI/ML context.

9. How Ground Truth for the Training Set Was Established

• Ground Truth Establishment: Not applicable/Not specified. Since no training set is mentioned (see point 8), there's no information on how its ground truth would have been established.

Summary of what the 510(k) does communicate regarding evidence for meeting intended use:

The 510(k) for the Toshiba Automatic Image Registration Software, Model NSFU-050A, primarily relies on substantial equivalence to predicate devices. It asserts that:

• The device's intended uses are not new and are found in already cleared devices (predicate devices: Toshiba GMS-5500A/UI Nuclear Medicine Image Processor and ADAC Image Fusion and Review System).
• The technological characteristics are "the same as that of the predicate devices."
• "Multimodality image fusion is well understood and is documented in peer-reviewed scientific publications."

This suggests that rather than providing a detailed performance study with specific acceptance criteria and outcome metrics for this new product, the submission argues that the underlying technology and its application are already proven and legally marketed through the predicate devices. The FDA's clearance (DEC - 3 1999) indicates acceptance of this argument for substantial equivalence.

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This program can be utilized for all traditional and accepted gamma camera applications. It is expected that its benefits will be realized primarily when the system is being used to acquire tomographic studies. The intended use of the gamma camera system is unchanged by this program.

This product is an optional software program available for the Toshiba DI-series devices. It is intended to give a user the ability to acquire scatter data during acquisitions, then remove the unwanted scatter data from the processed image data. Based on the Triple Energy Window method of Compton - Scatter Correction, this program calculates the location and amount of scatter data in each pixel and subtracts it from the patient data.

The provided text is a 510(k) summary for a software program called "Scatter Correction Volume Software for Toshiba Gamma Cameras, Model NSSC-020A". This document focuses on demonstrating substantial equivalence to a predicate device and outlining the software's functionality rather than presenting a detailed clinical study with specific acceptance criteria and performance metrics.

Therefore, the requested information regarding acceptance criteria, device performance, study details, ground truth establishment, expert qualifications, adjudication methods, and MRMC studies cannot be extracted from the provided text. The document describes the software's purpose (removing scatter data from gamma camera images using the Triple Energy Window method) and states that the intended use of the gamma camera system remains unchanged, implying that the software is not introducing new clinical claims that would necessitate such detailed performance studies in this specific 510(k) submission.

The document states:

• "This product is computational only and does not affect the physical characteristics of the host device."
• "Determination of and correction for Compton-scatter effects are well understood and documented in peer-reviewed scientific publications."
• "Due to the absence of new intended uses, it follows that the overall safety and effectiveness of the gamma camera system is not changed by this program."

These statements suggest that the FDA's clearance for this software was likely based on its computational nature and the established scientific principles of scatter correction, rather than a clinical trial demonstrating improved diagnostic accuracy or specific performance against defined acceptance criteria.

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