8.4 Receptor Care, Patient Preparation, Image Management & Radiographic Anomalies

8.4 Receptor Care, Patient Preparation, Image Management & Radiographic Anomalies

Quick Answer: Several radiography competencies sit outside physics and technique:

• care, storage and handling of receptors (5.2.3.4)
• pre-exposure information and consent (5.2.3.7)
• uploading images to the correct record (5.2.3.11)
• software enhancement (5.2.3.14)
• duplicating, transferring and archiving (5.2.3.15)
• recognizing dental anomalies and materials on images (5.2.3.17).

Safety Code 30 says unexposed film should be stored on edge, shielded from radiation, at 10–21°C and 30–60% humidity. PSP plates must never be bent or scratched. Sensors are covered with a fresh barrier for every patient. Enhancement tools change only how an image is displayed: always keep the unaltered original. Transfers require patient consent and secure transmission.

1. Care, Storage and Handling of Image Receptors

Film

• Store unexposed film on edge, away from chemical fumes, heat and stray radiation, at 10°C to 21°C and 30% to 60% relative humidity (Safety Code 30). Follow the manufacturer's expiry date and use the oldest stock first.
• Let sealed packets reach room temperature before opening. Keep film out of the X-ray room during exposures unless it is shielded.
• Do not bend film packets. Creases appear as black lines on the image.
• Process film according to the manufacturer's time and temperature. Safety Code 30 forbids "sight developing" (changing the developing time by looking at the film). Replenish and change solutions on schedule, and send used fixer and lead foil for recycling.

Photostimulable phosphor (PSP) plates

• Handle plates by the edges with clean, dry gloves, and place each plate in a fresh, sealed barrier envelope before use.
• Never bend, fold or slide plates against hard surfaces. Scratches and creases become permanent white artifacts.
• Protect exposed plates from room light and scan them promptly. Bright light starts to erase the latent image.
• After scanning, erase each plate fully and inspect it. Replace scratched or worn plates.

Digital sensors (CCD/CMOS)

• Cover the sensor and the first part of the cable with a new barrier sleeve for every patient. Clean and disinfect with a product the manufacturer approves. Sensors cannot be autoclaved.
• Protect the cable from being bitten, kinked or run over by chair casters. Use holders designed for the sensor.
• Store sensors in their protective case. Dropping a sensor can crack the scintillator or the housing.

2. Pre-Exposure Information, Instructions and Consent

Before any exposure:

1. Confirm that the dentist has prescribed the images (radiographs are never taken on a routine schedule; see section 8.1).
2. Explain to the patient (or caregiver) why the images are needed, what will happen and how long it takes, and answer questions about radiation dose in plain language. This is part of informed consent. Record the consent and any refusal.
3. Ask whether the patient is or may be pregnant. Elective images may be deferred, but essential images can be taken with normal precautions.
4. Remove items that would appear on the image: eyeglasses, earrings, facial piercings, hairpins, removable dentures, retainers and partial dentures (especially for panoramic images).
5. Place the thyroid shield for intraoral images unless it would interfere. Do not use it for most panoramic protocols.
6. Give clear instructions, for example: "Bite gently and stay very still until I tell you."

3. Uploading Images to the Patient's Record

• Open the correct patient's record before exposing, and confirm the name and a second identifier (such as date of birth).
• Check that each image is linked to the right date, tooth region and image type (bitewing, periapical, occlusal, panoramic, CBCT). Mount or orient images in the software using the labial (face-to-face) convention.
• Record the number and type of images, any retakes and the reason for each, in the chart (Safety Code 30 requires full details, including retakes).
• If an image is saved to the wrong patient, do not delete it. Report it so that it can be corrected with an audit trail.

4. Image Enhancement in Imaging Software

Rules:

• Enhancement changes only the display. The software must keep the original, unaltered image, and enhanced versions are saved as copies.
• Enhancement cannot rescue a non-diagnostic image (cone cut, severe distortion, motion).
• Use enhancement to view the image better, never to hide an error.

5. Duplicating, Transferring and Archiving

• Film duplication: duplicating film produces a copy of an existing radiograph. Because it is a direct-positive film, a longer duplication exposure makes the copy lighter, and a shorter exposure makes it darker. Label the copy as a duplicate, with the date.
• Digital copies: export a copy in the original format (often DICOM) or as a high-quality image file. Keep the original in the practice record.
• Transfer: send images to specialists, insurers or another dentist only with the patient's consent, or as permitted within the circle of care. Use an encrypted, secure method, and record what was sent, to whom and when. Safety Code 30 recommends that relevant images accompany a patient who moves to another practitioner, to avoid unnecessary retakes.
• Archiving: radiographs are part of the clinical record and are kept for the same retention period as the chart (section 7.3). Back up digital images and store them securely. Never release original films; send duplicates.

6. Radiopaque and Radiolucent Appearances of Materials and Anomalies

Restorative and dental materials

Dental anomalies and common findings

The assistant's role is to recognize normal and abnormal appearances, so that images are mounted correctly, retakes are avoided and findings are brought to the dentist's attention. Interpreting pathology and making a diagnosis remain the dentist's responsibility.