Imaging test | Number (5) |

V/Q scans | 318 |

CTPA | 187 |

Patients with only V/Q | 107 (43.7%) |

Mean number of V/Q | 1.5 |

Maximum number V/Q | 5 |

Patients with only CTPA | 65 (26.5%) |

Mean number of CTPA | 1.2 |

Maximum number CTPA | 4 |

Patients with both CTPA and V/Q scans | 73 (29.8%) |

Mean number CTPA | 1.5 |

Maximum number CTPA | 5 |

Mean number V/Q | 2.0 |

Maximum number V/Q | 18 |