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The C4 Fiducial Marker is indicated to be implanted into the body in situations where the location of specific anatomy, normal or diseased, needs to be marked for a future medical procedure. The device can be visualized using MRI, CT or x-ray, and provides a reference from which other procedures can be guided.

The C4 Fiducial Marker consists of a sealed polyether ether ketone (PEEK) polymer tube containing a solution of up to 1% cobalt chloride and up to 2% N-Acetylcysteine, The ratio of cobalt chloride to N-Acetylcysteine is 1:2. Zirconium oxide is sealed within the polymer shell of the device. The length of the polymer capsule is between 5.5 mm and 10.0 mm, and the diameter is 1.0 mm (+/- 0.2 mm).

The HDR MRI Lumen Marker is indicated as an accessory for use with FDA Market Cleared remote controlled radionuclide applicator systems that are used to treat tumors that are indicated for treatment with high dose rate (HDR) brachytherapy. The HDR MRI Lumen Marker is indicated for temporary placement in HDR applicator lumens. The HDR MRI Lumen Marker is intended to facilitate the identification of HDR applicator treatment lumens. It is intended to be non-patient contacting and only placed in applicators that are designed to prevent patient tissue or bodily fluids accessing the inner lumen. Once placed in an HDR applicator lumen the HDR MRI Lumen Marker is intended to be imaged with MRI. It is removed after MR imaging and prior to the placement of a radioactive source. The HDR MRI Lumen Marker is intended for use in a single patient and can be used more than once if required for a single course of treatment in a single patient.

The HDR MRI Lumen Marker is a sealed high-density polyethylene (HDPE) tube containing a cobalt chloride N-Acetylcysteine saline solution. The HDPE tube is up to 350.0 mm in length and 1.0 mm in diameter, with the distal 19.0 mm of the tube accommodating a HDPE sealing plug. The distal end of the device is provided with an attached HDPE end-cap for handling. This end cap is approximately 3.0 mm in length. The HDR MRI Lumen Marker is an accessory to remote controlled high dose rate (HDR) radionuclide applicator systems and facilitates the identification of lumens within MRI compatible HDR brachytherapy applicators. Each HDR MRI Lumen Marker is supplied with a silicone stopper designed to hold the device in place once fully inserted into an applicator.

The MRI Marker is a component device indicated as an accessory for use in conjunction with brachytherapy seed carrier sleeves and radionuclide brachytherapy sources containing one of the following isotopes: Iodine 125 (1851). Palladium 103 (103Pd) or Cesium 131 (131Cs). It is indicated for permanent interstitial implantation in the prostate of patients with confirmed prostatic malignancy.

C4 Imaging's MRI Marker™ consists of a sealed polyether ether ketone (PEEK) polymer capsule containing a cobalt chloride:N-Acetylcysteine (CoCl2:NAC) solution. It is used as an accessory to radionuclide sources (seeds) during prostate brachytherapy procedures. The length of the capsule is 5.5 mm and the diameter is 0.8 mm.