Exam 2 (Topics 2-4 Sim Wed AM Course)

currently only topic 2 material******

Essential Components of Radiation Therapy Therapy

Simulation, Planning, Administration of prescribed course of radiation therapy

Radiation Therapist Core Responsibilities

Quality treatment delivery, patient care, monitoring/understanding complex equipment, and accurately documenting treatment/care in patient charts

Key Factors in Treatment Delivery

Precision and reproducibility in simulation/treatment delivery, attention to physician orders/prescriptions, anatomy competency, set-up protocols, immobilization devices, physics, biologic responses, ethical/legal considerations, communication, and teamwork

Radiation Oncology Chart Definition

The communication nucleus for the radiation team, separate from the hospital record, and restricted only to authorized personnel

Access to Radiation Oncology Chart

Restricted only to authorized persons with permission and a valid reason to access (General Practitioners do not typically have direct access unless authorized)

Radiation Oncology Chart Legal Status

A medical and legal record that must be complete, organized, and accurate, with the radiation therapist held ethically and legally accountable for patient privacy

Paper Chart Characteristics

Antiquated; must be legible, locked in a private area, and remain in the department; difficult for simultaneous multi-user access; easier for teaching, treating, and localizing information

Electronic Medical Record (EMR) Characteristics

Routine charting medium that integrates text/images; centrally stored and remotely accessible; higher security/integrity; harder for teaching; includes schedules, physician communications, and diagnostic results

Information Documented in Treatment Chart

Medical history, diagnostic/staging results, general medical conditions, and clinical rationale supporting oncologist recommendations

Informed Consent Requirements

Verification that the patient/guardian understands disease status, treatment options, and consequences with or without treatment before starting care

Methods for Monitoring Radiation Reactions

Direct observation, laboratory tests, questions/observations regarding nutritional intake, skin reactions, and other treatment-related symptoms

Weekly On-Treatment Visits

Conducted by the radiation oncologist and nurse to track weight changes, symptom emergence, and overall response indicators

Paper/Film Image Records

Antiquated records that require physical storage space, easy to review, but can be less accurate

Electronic Image Records

Integrated text/imaging providing improved diagnostic/planning data, faster verification, and tracking of treatment localization/reproduction

Unique Features of Radiation EMR

Specialized for radiation prescription, treatment plan, dose/equipment delivery logs, beam modifier notes (bolus, mask, wedge, compensator), therapist IDs, and delivery times for multiple daily fractions

Treatment History Parameters

Treatment date, treatment number, daily fraction, fraction time intervals, elapsed days, fractional dose, cumulative dose, and total dose

Verify and Record (V&R) System Purpose

Aids accurate delivery by validating treatment plan parameters against machine setup, comparing daily settings to prescribed settings, and preventing beam initiation if parameters exceed tolerance limits

Verify and Record (V&R) Functions

Patient identification, field size/openings, field selection, auto-sequencing, auto-setup of machine parameters (gantry, collimator, table rotation), and beam delivery tracking (monitor units, beam modifiers)

Quality Assurance (QA) Program Purpose

Activities and documentation performed to reduce errors, optimize patient care, and ensure precise treatment execution

Required Patient Chart QA Elements

Patient history, diagnostic evaluation, treatment rationale, detailed treatment plan description, informed consent, and detailed treatment delivery records

Radiation Therapist Primary Role in QA

Ensuring accurate delivery by reviewing patient records, monitoring equipment performance, maintaining treatment reproduction accuracy, monitoring patient status changes, and maintaining complete records

Therapist Weekly Chart Review Tasks

Monitoring SSD measurements, diode measurements, verification imaging frequency/physician review, dose accuracy, physics chart checks, oncologist sign-offs, and reimbursement charges

Common Charting Error Type

Numerical errors, most frequently found in the dose record

Paper Chart Error Correction Protocol

Draw a single line through the mistake, initial, and date it (never use correction fluid)

Electronic Record Error Correction Protocol

Changes must be transparent, maintaining system version histories with timestamp and user ID tracking

Chart Review Checklist Before Treatment

Verify patient identification, signed prescription, detailed patient/equipment setup details, dosimetric calculations, and treatment history completeness

Radiation Prescription Authority

Delivered only under direct order of a Radiation Oncologist; orders must be signed and dated prior to the initial treatment session

Key Elements of an EBRT Prescription

Anatomic site (diagnosis), delivery method (photons, electrons, isotope), dose per fraction, number of fractions, and total dose

Additional Prescription & Record Information

Protraction (total timeframe), schedule, planning instructions, beam energy, beam type, gantry angles, beam modifiers, and patient positioning details

Therapist Duty as Prescription Dispenser

Possess knowledge of radiation treatment effects, tumor-lethal doses, normal tissue tolerance limits, and monitor plan changes throughout treatment

Prescription Discrepancy Protocol

Any prescription exceeding standard tolerance limits or deviating from standard practice must be reviewed with the physician before beam delivery

Radiation Therapist Role in Patient Safety

Serves as the final line of defense to eliminate errors and ensure safe treatment delivery

Prescription Change Requirements

Must be accompanied by a physician signature and date (e.g., changes to fractionation, dose adjustments, addition/deletion of beam modifiers, or treatment discontinuation)

Treatment Plan & Reference Image Review Items

Setup instructions, positioning diagrams/photographs, immobilization devices, and surface landmarks indicating isocenter position

Isocenter Definition

The intersection of the gantry axis, collimator axis, and treatment couch axis of rotation

Treatment Field Identification

Target volume representation assigned an identifier and name indicating prescription site and beam direction, measured as width by length in centimeters

Pre-Beam On Checks

Verify time since last treatment, current treatment progress, intended field/site, verification image requirements, recent plan changes, and weekly visit compliance

Historic Image Review Questions

Confirm whether previous images were reviewed, setup changes were ordered, required setup verification methods, and field images needed for the current session

Therapist Room Upkeep Responsibilities

Maintaining ergonomic movement, lighting, orderliness, infection control, monitoring unit performance, inspecting accessories/immobilization devices, and stocking supplies

Treatment Room Design Concept

Radiates outward from the isocenter to allow efficient movement around the focal point with adequate storage

Treatment Room Lighting Protocols

Standard bright lighting for safe entry/exit; dim lighting for visualizing setup lasers and field lights during patient positioning

Treatment Room Preparation

Prepping setup parameters, positioning devices, and required accessories before the patient enters the room

Elapsed days

Total time over which radiation treatment is delivered (protracted).

Field (treatment)

The tissue volume exposed to radiation from a single radiation beam; also known as treatment portals or ports.

Field (light)

Also known as light field; the light localizing system located in the treatment head that outlines the dimensions of the radiation field as it appears on the patient.

Fraction

A single treatment dose.

Fractionation

Radiation therapy treatments given in daily fractions (segments) over an extended period of time, sometimes up to 6 to 8 weeks.

Immobilization

Process of ensuring that a patient does not move out of treatment position, thus allowing for reproducibility and accuracy in treatment.

Immobilization devices

Devices that assist in reproducing the treatment position while restricting movement (i.e., casts, masks, or bite blocks).

Isocenter

Point of intersection of the three axes of rotation (gantry, collimator, and base of couch) of the treatment unit.

Localization

Geometrical definition of the tumor and anatomic structures using surface and/or fiducial marks for reference.

Meterset

Units measuring exposure produced by a treatment machine, usually Monitor Units (MU) or time.

Protraction

Time over which total dose is to be delivered.

Treatment record

Documents the delivery of treatments, recording fractional and cumulative doses, machine settings, verification imaging, and the ordering/implementation of prescribed changes.

Treatment technique

Defined method by which a treatment is delivered to the patient.

Triangulation

Treatment isocenter is located relative to three setup coordinates on the patient’s surface or on the equipment fixed relative to their anatomy.

Verification Imaging

Radiographic or electronic treatment documentation using images.