高國慶院長'高御尊醫師'高御龍電商 高御書生化營養師[收集資訊交流站]美兆醫療專家

PYREXAR HyperThermia (HT) systems deliver therapeutic heating via non invasive radio frequency (RF) energy in the 75-140 MHz range (BSD-500 delivers at a fixed 915 MHz) During PYREXAR HT treatment, the cancerous tumor is gently warmed to 40˚-45˚C (104˚-113˚F) destroying malignant cells while preserving normal tissues. This is because higher temperatures selectively damage cells that are hypoxic and have a low pH, a condition of cancer cells that is not present in normal cells.

Superficial

The BSD-500 Superficial is a versatile, fully self-contained treatment system in a mobile configuration for maximum treatment flexibility of superficial tumors (within 1” of skin surface).

• Generator: 915 MHz / 0-400 Watts total power and 0-60 Watts per channel / 8 Channels (no RF shielding required).
• Wave Guides: Three (3) external wave guide applicators for direct energy application to solid surface tumors (MA-120, MA-151, MA-100), including overhead suspension adjustable arm system.
• Thermometry: Eight (8) ports for thermistor type sensors, sensor simulator and thermal probe calibration well.
• Workstation: Integrated PC with treatment planning software and touch screen monitor

Interstitial

Interstitial hyperthermia delivers heat directly to a tumor using arrays of up to 24 independent,flexible dipole antenna wires energized with eight (8) independent power channels.

Interstitial therapy capabilities are incorporated into the BSD-500.

The BSD-500i is a standalone interstitial therapy system configured similar to the BSD-500 but without external wave guides and supporting apparatus. The BSD-500 is the most popular PYREXAR HT system with more than 50 in clinical use throughout the US.

Deep Regional

The BSD-2000 series systems use an annular phased array configuration of up to 8 diapole antennas to shape and focus thermal energy on targeted treatment area deep inside the pelvis, abdomen, limbs or chest with 2D electronic focal steering with the 4 channel RF power generator. (Note this is for the Sigma Eye in Europe. The applicator arrays in the U.S. only provides up to 8 dipole antennas.)

• Generator: 75 – 140 MHz / 0–325 or 0-450 Watts per channel / 4 Channels for BSD-2008B and BSD-2000U (RF shielding required).
• Phased Array Dipole Applicators: Sigma Elipse and Sigma 60 (standard); Sigma 40/30 (optional in some countries).
• Sigma Base: Comfortably positions and supports patient on sling inside phased array aperture.
• Thermometry: Eight (8) ports for thermistor type sensors, sensor simulator and thermal probe calibration bath.
• Workstation: PC with treatment planning software and touch screen monitor.

BSD-2000 3D additionally includes:

• Sigma Eye with 24 dipole antenna with 8 dipoles per annular ring to provide 3D electronic focus steering using 12 RF power channels.  Can also be used with the other phased array applicators. 

BSD-2000 3D/ MRI additionally includes:

• Integration with 1.5 Tesla MR system (instead of Sigma Base).
• MR image guided real-time non-invasive thermometry

 

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Components

Generator for BSD-2000

The generator develops high frequency electrical power output from a conventional three phase 415Vac source with multi-channel independent phase and amplitude adjustment capability. An integrated computer controls forward and reflected power, phase and power level on each channel. Frequency range of 75-140MHz.

Generator for BSD-500

The generator develops high frequency electrical power output from a conventional single phase 115/220Vac source with multi-channel independent phase and amplitude adjustment capability. An integrated computer controls forward and reflected power, phase and power level on each channel. Frequency 915MHz.

BSD-500 Wave Guides

Using electrical signal from generator, the wave guide creates and projects the RF energy beam toward the treatment area. Tissue absorption of this energy beam causes warming by tissue excitation.

BSD-500 Single Source (915 MHz):

Model	Aperture (cm)	Treatment Field (cm)	Typical Power (Watts)	Configuration
MA-100	10"Wx13"L	8"Wx10"L x 2.5" deep	100	Side-loaded
MA-120	18"Wx24"L	12.5"Wx19.5"L x 2.5" deep	250	Side-loaded
MA-151	4"Wx5"L	2.5"Wx2.5"Lx 2.0" deep	40	Mini-Dual Ridge

BSD-2000 Annular Phased Array (75 – 140 MHz):

Model	Aperture(cm)	Field Depth(cm)	Rings	Channels	Sources	Configuration
Sigma 30 Optional non-US	30	13	1	4	8	Circular / single array
Sigma 60	60	20	1	4	8	Circular / single ring array
Sigma Elipse	60	20	1	4	8	Circular / single ring array
Sigma EYE non-US	54"Wx37"H	20	3	12	24	Ellipsoidal / triple ring array 100MHz
Sigma EYE/MR non-US	54"Wx37"H	20	3	12	24	Ellipsoidal / triple ring array 100MHz

Interstitial Coaxial Wire (915 MHz):

The MA-251 is a semi-rigid 15.5 gauge wire coaxial cable providing an ellipsoidal heating pattern approximately 4.5 cm in length along the applicator shaft with heating to the wire tip.

The MA-251 fits inside 5F catheters commonly used for brachytherapy.

RF Shielding

Annular Phase Array wave guides use non-ISM frequencies and require RF shielding. Single Source and Interstitial Wire wave guides use the Industrial, Scientific and Medical (ISM) radio band (915 MHz) and do not require RF Shielding.

Water Module

Water filled bolus on wave guide surface provides dielectric load and energy-confining medium.

• Modes: Fill, Drain, Circulate, Heat, and Cooling.
• Temperature Range: 25°C to 40°C