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Question 1

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For optimal Doppler velocity measurement during carotid duplex imaging, the angle between the ultrasound beam and the direction of blood flow should be:

As close to 90 degrees as possible

60 degrees or less

Between 70 and 80 degrees

Exactly 0 degrees

to track

2026 Statistics

Key Facts: RVS Exam

170

Total Questions

CCI RVS exam structure

150 + 20

Scored + Pretest

CCI Candidate Handbook

3 hours

Exam Time

CCI RVS

650/800

Passing Score

CCI scaled scoring

$365

Exam Fee

CCI fee schedule

20%

Carotid Duplex

Largest content domain

3 years

Cert Validity

CCI recertification

The CCI RVS exam contains 170 multiple-choice questions (150 scored + 20 pretest) delivered over 3 hours at PSI test centers. The credential certifies full-scope vascular sonography. Passing requires a 650 scaled score (300-800 scale). Coverage spans carotid duplex (SRU velocity criteria), peripheral arterial duplex with ABI/TBI, venous reflux mapping (0.5 sec deep / 1.0 sec superficial cutoffs), AAA surveillance, renal and mesenteric criteria, dialysis access, and ultrasound physics. RVS differs from CCI RPhS, which is venous-focused.

Sample RVS Practice Questions

Try these sample questions to test your RVS exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1For optimal Doppler velocity measurement during carotid duplex imaging, the angle between the ultrasound beam and the direction of blood flow should be:

A.As close to 90 degrees as possible

B.60 degrees or less

C.Between 70 and 80 degrees

D.Exactly 0 degrees

Explanation: Doppler angle correction must be 60 degrees or less to maintain velocity accuracy. As the angle approaches 90 degrees, the cosine of the angle approaches zero and velocity calculations become unreliable. Society of Radiologists in Ultrasound (SRU) and IAC standards require Doppler angles of 60 degrees or less for vascular velocity measurements.

2A sonographer scanning a deep abdominal vessel needs to balance penetration with resolution. Which transducer frequency is most appropriate for an aortic duplex on an average-sized adult?

A.12-15 MHz linear

B.7-9 MHz linear

C.2-5 MHz curvilinear

D.15-18 MHz hockey stick

Explanation: A 2-5 MHz curvilinear (curved array) transducer provides adequate penetration for deep abdominal structures like the aorta, IVC, renal arteries, and mesenteric vessels. Lower frequencies penetrate deeper but with reduced spatial resolution. Higher frequency linear probes are reserved for superficial peripheral vessels.

3Aliasing on color Doppler imaging occurs when:

A.The Doppler shift exceeds half the pulse repetition frequency

B.Tissue harmonic imaging is enabled

C.The wall filter is set too high

D.The gain is set too low

Explanation: Aliasing occurs when the Doppler frequency shift exceeds the Nyquist limit, which is one-half of the pulse repetition frequency (PRF). This causes the displayed velocity to wrap around, appearing as flow in the opposite direction. Aliasing can be reduced by increasing PRF (scale), shifting baseline, or decreasing transmit frequency.

4Which adjustment will MOST effectively reduce aliasing during a renal artery Doppler exam when peak velocities exceed the displayed scale?

A.Decrease the color gain

B.Increase the pulse repetition frequency (scale)

C.Increase the wall filter

D.Switch to power Doppler

Explanation: Increasing PRF (scale) raises the Nyquist limit and is the most direct way to resolve aliasing when high velocities are present. Other options include shifting the baseline, decreasing the transducer frequency, and reducing the Doppler angle. Increasing PRF is the standard first-line correction.

5Tissue harmonic imaging improves image quality primarily by:

A.Increasing penetration depth in obese patients

B.Reducing near-field clutter and side-lobe artifacts

C.Eliminating the need for Doppler angle correction

D.Increasing temporal resolution for cardiac applications

Explanation: Tissue harmonic imaging (THI) uses returning echoes at twice the transmitted frequency. Because harmonics are generated within tissue rather than at the transducer surface, near-field clutter, side-lobe artifacts, and reverberation are reduced. THI improves contrast resolution especially in technically difficult patients.

6The spectral Doppler sample volume (gate) for measuring peak systolic velocity in the internal carotid artery should be:

A.Placed at the wall to detect plaque

B.As wide as the vessel lumen

C.Centered in the lumen and 1.5-2 mm in size

D.Placed just distal to the carotid bulb only

Explanation: For peak velocity measurement, the sample volume should be small (typically 1.5-2 mm), centered in the vessel lumen, and aligned with the direction of flow. A small gate captures the central laminar flow stream. Sampling at the wall or with an oversized gate introduces spectral broadening artifacts.

7During a peripheral arterial duplex, the sonographer notices excessive color bleed into surrounding tissue and the color box overflowing the lumen. The MOST appropriate first correction is to:

A.Decrease color gain

B.Increase color persistence

C.Increase wall filter to maximum

D.Switch to a lower frequency probe

Explanation: Color bleed (overwriting of true color signals onto surrounding tissues) typically results from excessive color gain. The technique is to increase gain until noise appears, then back off slightly. Other refinements include reducing the color box size and optimizing PRF.

8In the Doppler equation, which variable is squared and therefore has the greatest effect on Doppler shift error from misalignment?

A.Cosine of the Doppler angle

B.Speed of sound in tissue

C.Transmit frequency

D.Reflector velocity

Explanation: In the Doppler equation, the Doppler shift is proportional to cos(theta). Although cos(theta) itself is not squared, it changes nonlinearly: a small angle error at high angles (e.g., 70 to 75 degrees) produces a much larger velocity error than the same change at low angles. This is why ARDMS, IAC, and CCI standards mandate angles 60 degrees or less.

9Power (energy) Doppler differs from color Doppler in that power Doppler:

A.Displays direction and velocity of flow

B.Is more sensitive to slow flow but lacks direction information

C.Always uses higher PRF settings

D.Cannot be used in superficial vessels

Explanation: Power Doppler displays the integrated amplitude of the Doppler signal, providing higher sensitivity to slow flow with less angle dependence. However, it does not encode flow direction or velocity. Power Doppler is useful for detecting flow in small vessels, distal extremities, and slow renal flow.

10Spectral broadening on a carotid Doppler waveform is BEST described as:

A.Filling in of the spectral window during peak systole

B.A loss of color signal in the vessel center

C.An increase in gray-scale brightness

D.A change in flow direction during diastole

Explanation: Spectral broadening refers to a filling-in of the normally clear spectral window beneath the peak systolic envelope. It indicates a wider range of velocities (turbulent or disturbed flow) within the sample volume. While spectral broadening can suggest stenosis, it can also be caused by oversized sample gates or improper gain.

About the RVS Exam

The CCI Registered Vascular Specialist (RVS) credential validates comprehensive competency in vascular ultrasound, including cerebrovascular, peripheral arterial, peripheral venous, abdominal/visceral, dialysis access, and aneurysm assessment. RVS is the CCI vendor alternate to ARDMS RVT.

Questions

170 scored questions

Time Limit

3 hours

Passing Score

650 (scale 300-800)

Exam Fee

$365 (CCI / PSI Testing)

RVS Exam Content Outline

10%

Ultrasound Physics for Vascular

Transducer selection, frequency tradeoffs, Doppler principles, aliasing, color/spectral optimization, harmonic imaging

20%

Carotid Duplex

ICA/CCA/ECA differentiation, SRU velocity criteria, plaque characterization, vertebral artery and subclavian steal

15%

Peripheral Arterial Lower Extremity

Segmental pressures, ABI, TBI, duplex velocity ratios, CLTI staging, bypass and stent surveillance

Peripheral Arterial Upper Extremity

Allen/Barbeau, subclavian/axillary, thoracic outlet syndrome positional duplex

15%

Venous Lower Extremity

DVT diagnosis, May-Thurner, CVI reflux mapping, CEAP, post-ablation surveillance and EHIT

15%

Abdominal Vascular

AAA screening and EVAR endoleaks; renal artery duplex; mesenteric duplex; hepatic and TIPS surveillance

Cerebrovascular Non-Carotid

Vertebral artery duplex and transcranial Doppler basics

Hemodialysis Access

AVF/AVG surveillance, vein mapping, volume flow criteria, steal evaluation

Aneurysm and Pseudoaneurysm

True vs pseudoaneurysm, popliteal aneurysm, ultrasound-guided thrombin injection

Quality, Ergonomics, Professional

IAC accreditation, ALARA, sonographer ergonomics, RVS Code of Ethics

How to Pass the RVS Exam

What You Need to Know

Passing score: 650 (scale 300-800)
Exam length: 170 questions
Time limit: 3 hours
Exam fee: $365

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

RVS Study Tips from Top Performers

1Master SRU carotid stenosis criteria: ICA PSV greater than 125 = >50%, greater than 230 = >70%; ICA/CCA ratio greater than 2 / greater than 4

2Memorize ABI ranges: 1.0-1.4 normal, 0.91-0.99 borderline, 0.71-0.90 mild, 0.41-0.70 moderate, 0.4 or less severe, greater than 1.4 non-compressible

3Use TBI for diabetics with non-compressible ABI; abnormal TBI is less than 0.7

4Know venous reflux cutoffs: greater than 0.5 sec for deep veins, greater than 1.0 sec for superficial veins

5AAA size thresholds: 3 cm defines aneurysm, 5.5 cm men / 5.0 cm women is repair threshold (SVS)

6Renal artery PSV greater than 180-200 cm/s with renal-aortic ratio greater than 3.5 indicates significant RAS

7Practice the Doppler equation: angle correction must be 60 degrees or less for accurate velocities

Frequently Asked Questions

What is the CCI RVS exam?

The Registered Vascular Specialist (RVS) is CCI's comprehensive vascular ultrasound credential. It certifies sonographers in cerebrovascular, peripheral arterial, peripheral venous, abdominal/visceral, dialysis access, and aneurysm assessment. RVS is comparable in scope to the ARDMS RVT and is the CCI vendor alternate.

How many questions are on the RVS exam?

The CCI RVS exam contains approximately 170 multiple-choice questions (150 scored plus 20 unscored pretest). Candidates have 3 hours to complete the exam at a PSI test center.

What score do I need to pass the RVS exam?

CCI uses a scaled scoring system from 300-800 with 650 required to pass. Scaled scoring adjusts for difficulty variation across exam forms.

How is RVS different from RPhS?

The Registered Vascular Specialist (RVS) covers full vascular ultrasound: cerebrovascular, peripheral arterial, peripheral venous, abdominal, and dialysis access. The Registered Phlebology Sonographer (RPhS) is venous (phlebology) focused. Both credentials are issued by CCI.

How is RVS different from ARDMS RVT?

RVS (CCI) and RVT (ARDMS) are equivalent credentials covering the same scope (comprehensive vascular ultrasound) but issued by different organizations. Many sonographers hold one or the other based on employer preference, geography, or training pathway.

How much does the RVS exam cost?

The CCI RVS application and exam fee is approximately $365. Retake fees are lower (around $295). Recertification requires CME every 3 years; some candidates also factor in study materials and prep courses.

What are the eligibility requirements for the RVS?

CCI offers multiple pathways to the RVS exam, including completion of an accredited vascular ultrasound program, an existing related ultrasound credential plus vascular case experience, or a clinical-experience-only pathway with documented vascular ultrasound hours. Verify the latest CCI Candidate Handbook for exact pathway requirements.