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Product Overview
3.1 Product Overview
P3T allows users to create individualized contrast injection protocols based on patient characteristics,
contrast media properties and other procedure parameters. Contrast dosage is determined based on
the iodine to be delivered to the patient (for example, a heavier patient will receive more grams of
iodine while a lighter patient will receive fewer grams of iodine).
P3T PA is a module available as part of the P3T platform that enables optimizing of contrast injection
protocols for CT angiography of pulmonary vasculature. This module automates the calculation of
individualized contrast injection protocols that would otherwise have to be performed manually by the
user.
The user enters the patient's weight, the iodine concentration of the contrast media, and other key
parameters for the contrast injection protocol. Based on this input, P3T generates a protocol
specifically tailored to the individual patient by delivering a measured amount of contrast at a flow rate
that will allow all of the iodine to be delivered within the duration of the scan.
The overall injection protocol consists of two sub-protocols: an optional Pre-Diagnostic Protocol, and a
Diagnostic Protocol. The Pre-Diagnostic Protocol includes an optional Test Injection and/or Transit
Bolus phase.
The Transit Bolus phase injects a small amount of contrast or saline and is used to help determine the
time to peak enhancement in a specific area of interest and the peak enhancement level achieved
(information that is then entered into P3T to help configure the final diagnostic protocol).
3.2 Theory of Operation
3.2.1 Introduction to Presets
P3T Presets are user-defined templates that specify values for the input parameters required to
generate a P3T protocol. Presets enable the user to reuse specific input parameters without needing to
enter or modify input parameter values.
To create a personalized P3T protocol for each patient, the user recalls the defined preset from
memory and adds patient and procedure-specific information such as patient weight and contrast
concentration.
•
"Product Overview"
•
"Theory of Operation"
NOTE: P3T does not determine the appropriate contrast timing (i.e., flow rate or injection
duration). Physicians must determine the contrast timing.
NOTE: A Test Injection is available. A Test Inject phase injects a small amount of saline and
is used to check vein patency. Refer to the specific injection system operation
manual for more information.
NOTE: Refer to "Using Presets" on page 6 - 19 for information on using presets.
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